精英家教网 > 高中英语 > 题目详情
Koala bears as pets might be appealing to many of us. However, there are quite a few points to consider even before thinking of adopting one.
Koala bears are one of the most lovely Australian animals. In certain cases where the koala has been raised by hand, they have turned out to be quite affectionate pets. These people tied a piece of fur to a pillow and placed it beside a joey (a baby kola) as a substitute (替代物) for the mother koala. This trick seemed to work well with the baby koala. However, it is a known fact that human handling causes stress to koalas. In my personal opinion, this aspect clouds the fact that koala bears can be tamed (驯服).
In Australia the koala is a priority animal as far as conservation status assessment is concerned. It was hunted to near extinction (灭绝) for its fur. In fact the koala had been wiped out from South Australia in the 1920s. However, rehabilitation efforts have brought the animal back in the state. As for the Australia government, the koala is not a threatened animal, but the US government does list the koala as one.
Although they may live in 40 to 60 kinds of eucalyptus trees, they prefer only 10 to 14 specific kinds. Koalas sleep for most part of the day, which is about 16 to 18 hours, and for most of their waking hours all they do is eat. Koala bears eat the leaves of eucalyptus trees. A full-grown koala can eat almost 2 to 3 pounds of leaves in a day. Despite their slow movements and sweet look, koala bears can be vicious when hungry. Other than this, there are the stress caused to koalas due to human handling and the fights that start in koalas.
Almost everyone finds koalas lovely in the zoo. However, as far as having koala bears as pets is concerned, there are legal issues to consider. Other than that, being able to provide for its diet and habitat is another point that needs some attention before any law legalizing their adoption as pets is passed.
小题1:What’s the author’s attitude towards people raising the koala?
A.Optimistic.B.Grateful.C.Cautious.D.Enthusiastic.
小题2:Why did Australians hunt the koala?
A.To get its fur.B.To eat its meat.C.To wipe it out.D.To have it for fun.
小题3:The underlined word “vicious” in Paragraph 4 probably means __________.
A.fierce and dangerousB.patient and friendly
C.afraid and defensiveD.lovely and interesting
小题4:It can be inferred from the passage that __________.
A.koala bears tend to live in groups
B.koala bear care can be very demanding
C.koala bears are not particular about their food
D.koala bears are the No. 1 threatened animal in the US

小题1:C
小题2:A
小题3:A
小题4:B

试题分析:文章主要介绍了考拉熊的习性和现状。考拉熊虽然可爱,但不适合被当作宠物来饲养。因为捕猎,考拉曾经将近灭绝,考拉对食物很挑剔,对考拉的保护需要加强。
小题1:根据第一段“However, there are quite a few points to consider even before thinking of adopting one.”和最后一段的“as far as having koala bears as pets is concerned”可知,把考拉作为宠物来饲养有风险,需要三思而行。A乐观的;B感激的;C谨慎的,小心的;D热情的。故选C。
小题2:根据第三段的“It was hunted to near extinction (灭绝) for its fur.”可知,人们捕猎考拉熊是为了得到它的皮毛,故选A。
小题3:根据第四段“Despite their slow movements and sweet look, koala bears can be vicious when hungry. Other than this, there are the stress caused to koalas due to human handling and the fights that start in koalas.”可知,尽管考拉很可爱,但是它们饥饿的时候也会变得很凶残,人类的捕猎给考拉带来压力,考拉之间的打斗也会使考拉性格发生变化。故选A。
小题4:A项文中未提及;根据倒数第二段“Although they may live in 40 to 60 kinds of eucalyptus trees, they prefer only 10 to 14 specific kinds.”可知,考拉对食物很挑剔,排除C;根据倒数第三段“the koala is not a threatened animal, but the US government does list the koala as one”可知,美国把考拉列为濒危动物,但没有说是最濒危的动物,排除D;美国把考拉列为濒危动物,考拉对食物很讲究,因此,考拉的现状不容乐观。故选B。
练习册系列答案
相关习题

科目:高中英语 来源:不详 题型:阅读理解

The extraordinary Eastgate Building in Harare, Zimbabwe’s capital city, is said to be the only one in the world to use the same cooling and heating principles as the termite mound(白蚁堆).
Architect Mick Pearce used precisely the same strategy when designing the Eastgate Building, which has no air-conditioning and almost no heating. The building—the country’s largest commercial and shopping complex—uses less than 10% of the energy of a conventional building of its size. The Eastgate’s owners saved $3.5 million on a $36 million building because an air-conditioning plant didn’t have to be imported.
The complex is actually two buildings linked by bridges across a shady, glass-roofed atrium(天井) open to the air. Fans suck fresh air in from the atrium, blow it upstairs through hollow spaces under the floors and from there into each office through baseboard vents(通风口). As it rises and warms, it is drawn out via ceiling vents and finally exists through forty-eight brick chimneys.
During summer’s cool nights, big fans blow air through the building seven times an hour to cool the empty floors. By day, smaller fans blow two changes of air an hour through the building, to circulate the air which has been in contact with the cool floors. For winter days, there are small heaters in the vents.
This is all possible only because Harare is 1600 feet above sea level, has cloudless skies, little dampness and rapid temperature swings—days as warm as 31℃ commonly drop to 14℃ at night. “You couldn’t do this in New York, with its fantastically hot summers and fantastically cold winters,” Pearce said.
The engineering firm of Ove  Arup&Partners monitors daily temperatures. It is found that the temperature of the building has generally stayed between 23℃ and 25℃, with the exception of the annual hot period just before the summer rains in October and three days in November, when a doorkeeper accidentally switched off the fans at night. And the air is fresh—far more so than in air-conditioned building, where up to 30% of the air is recycled.
小题1:What’s the meaning of “complex” in the second paragraph? 
A.Something that is difficult to understand.
B.A group of buildings together in one place.
C.A group of things that are connected.
D.A mental state that is not normal.
小题2:How is fresh air from outside drawn out?
A.By fans.B.Via ceiling vents.
C.Through chimneys.D.Via ceiling vents and through chimneys.
小题3:What is NOT the factor that makes Eastgate Building work well?
A.Skies without clouds.
B.Little dampness.
C.Daily rapid temperature changes
D.Seasonal rapid temperature changes.
小题4:In general, how is the daily temperature of the building?
A.It changes in a certain range with some exception.
B.It changes from one extreme to another.
C.It remains the same without any exception.
D.It is hard to endure.
小题5:What’s the main idea of the passage?
A.The engineering firm of Ove Arup&Partners.
B.How air-conditioning works.
C.Fans make Eastgate Building’s temperature comfortable.
D.How Eastgate Building’s temperature control system works.

查看答案和解析>>

科目:高中英语 来源:不详 题型:阅读理解

Jerry Morris died on 28 October 2009. He was 99 years old. You have probably never heard of him. He was a professor of public health. More than 50 years ago he produced one of the most famous epidemiological (流行病学) papers of the 20th century.
His study showed that bus conductors were much less likely to die of heart disease than bus drivers. Why? Because the conductors spent their working day walking. It seems obvious now but in the middle of the last century doctors were puzzled by the rising numbers of people who got heart diseases. Jerry Morris found one of the main causes: a sedentary (久坐不动的) lifestyle. He started exercising for a few minutes each day and lived until his 100th year.
If you wish to protect your heart, you have to do more than wander in the garden. The exercise needs to be reasonable. Jogging is not for everyone and a round trip to the gym takes a couple of hours, plus the monthly membership fee is only good value if you visit regularly. The answer is simple: walk.
A half-hour purposeful walk five times a week will lower your risk of heart disease, diabetes and strokes. Older people sometimes feel they have left it too late. But it is never too late to start and there are no upper age limits. Start gently. Take your time: a 15-minute flat walk in the nearest park, four or five times a week. Within a month or so, you are already beginning to protect your heart. Build the walks up. When you can comfortably walk for half an hour in the park, go further: try following rivers and canals.
Regular walkers have their own natural gymnasium. There is no membership fee, just some of the finest scenery in the world. Great Britain is the walker’s gym. When you have followed the rivers and canals, and are enjoying walking for a couple of hours, head for the coast. Once again, build it up slowly. When you are comfortable with long coastal walks, you can think of our national parks.
小题1:Jerry Morris is mentioned in the first paragraph mainly to __________.
A.make his epidemiological message known to the public
B.praise his research into ways of improving public health
C.introduce the topic of doing exercise and keeping healthy
D.give an example of a person who lives a healthy and long life
小题2:We can learn from the passage that __________.
A.bus conductors are more likely to die of heart disease than bus drivers.
B.doctors in the 1950s knew why heart diseases kept happening to people.
C.walking is better than doing sports in a gym because it saves time and money.
D.British people love walking because they have free gymnasium with finest scenery.
小题3:What suggestion does the writer give about walking?
A.Parks are the best place for walking.
B.Starters should not push themselves too hard.
C.A two-quarter walk a day is suitable for starters.
D.People of old age might not be fit enough to start walking.
小题4:What might be the best title for this passage?
A.Long Life Comes from Walking
B.Walking Helps Cure Heart Disease
C.A Walk a Day Keeps the Doctors away
D.An Hour’s Walk in Nature is Worth Two in the Gym

查看答案和解析>>

科目:高中英语 来源:不详 题型:阅读理解

Everybody knows that colors are connected with certain feelings. For example, why do some people paint the walls of their rooms yellow and others pink? The same is true in stores. They want us to feel something when we look at their products.
Green, for example, tries to show the quality of a product: how good it is for us or for our environment. It also suggests that the product is healthier, has less fat and maybe fewer calories. Red, on the other hand is an aggressive color that is often used for packaging food. Red wants us to become hungry or thirsty. Purple is a kind of color that is often seen as royal. It indicates that it is something special. Producers use purple to show that something is of good quality. Blue is not very often found in food packaging because there are not very many foods that have a blue color.
Colors can also have different meaning in different cultures and countries. For example, while the color white is used in many Western countries to represent purity and innocence, it is seen as a symbol of mourning in many Eastern countries. The Egyptian pharaohs(法老) wore white crowns. A white sale is a sale of sheets, towels, and other bed and bath items. A white flag is the universal symbol for truce(休战). A white elephant is a rare, pale elephant sacred(神圣的) to the people of India, Thailand, Burma, and Sri Lanka. In these countries, something that is a white elephant is either a possession that costs more than it is worth to keep or an item that the owner doesn’t want but can’t get rid of.
Consumers are aware that certain foods must have certain colors. When Pepsi brought out a crystal clear cola in 1992, it thought that consumers would buy it because clear meant pure and healthy. After a few months Pepsi found out that a cola had to be dark-colored. Crystal Pepsi failed and the company pulled it off the market.
Advertising professionals often need to look at a product through the consumers’ eyes when choosing a color. The right packaging colors can truly improve the sales of a product but choosing a wrong color could end in failure.
小题1:According to the passage, blue is rarely used in food packaging because ____.
A.most consumers dislike it
B.it matches very few foods
C.it brings people low spirits
D.it doesn’t catch people’s eyes
小题2:According to the passage, in India if something is expensive but useless, it can be called   ____.
A.a white flagB.a white elephant
C.a white saleD.a white crown
小题3:Pepsi’s example is used to show ____.
A.Pepsi’s success comes from failures
B.health is the main concern in drink making
C.crystal clear drinks can’t attract consumers
D.people have fixed ideas about products and colors
小题4:What would be the best title for the passage?
A.Colors in advertising
B.Colors in food packaging
C.Our everyday life and colors
D.Foods in different colors

查看答案和解析>>

科目:高中英语 来源:不详 题型:阅读理解

Global warming is causing more than 300,000 deaths and about $125 billion in economic losses each year, according to a report by the Global Humanitarian Forum, an organization led by Kofi Annan, the former United Nations secretary general.
The report, to be released Friday, analyzed data and existing studies of health, disaster, population and economic trends. It found that human-influenced climate change was raising the global death rates from illnesses including malnutrition and heat-related health problems.
But even before its release, the report drew criticism from some experts on climate and risk, who questioned its methods and conclusions. Along with the deaths, the report said that the lives of 325 million people, primarily in poor countries,were being seriously affected by climate change. It projected that the number would double by 2030.
Roger Pielke Jr., a politicalscientist at the University of Colorado, Boulder, who studies disaster trends, said the Forum’s report was “a methodological embarrassment” because there was no way to distinguish deaths or economic losses related to human-driven global warming amid(在...中间) the much larger losses resulting from the growth in populations and economic development in vulnerable(易受伤害的) regions. Dr. Pielke said that “climate change is an important problem requiring our utmost attention.” But the report, he said, “will harm the cause for action on both climate change and disasters because it is so deeply flawed(有瑕疵的).”
However, Soren Andreasen, a social scientist at Dalberg Global Development Partners who supervised the writing of the report, defended it, saying that it was clear that the numbers were rough estimates. He said the report was aimed at world leaders, who will meet in Copenhagen in December to negotiate a new international climate treaty.
In a press release describing the report, Mr. Annan stressed the need for the negotiations to focus on increasing the flow of money from rich to poor regions to help reduce their vulnerability to climate hazards while still controling the emissions of the heat-trapping gases. More than 90% of the human and economic losses from climate change are occurring in poor countries, according to the report.
小题1: What is the finding of the Global Humanitarian Forum?
A.Rates of death from illnesses have risen due to global warming.
B.Global temperatures affect the rate of economic development.
C.Malnutrition has caused serious health problems in poor countries.
D.Economic trends have to do withpopulation and natural disasters.
小题2: What do we learn about the Forum’s report from the passage?
A.It caused a big stir in developing countries.
B.It was warmly received by environmentalists.
C.It caused a lot of interest in the scientific circles.
D.It was challenged by some climate and risk experts.
小题3: What is Soren Andreasen’s view of the report?
A.Its conclusions are based on carefully collected data.
B.It is vulnerable to criticism if the statistics are closely examined.
C.It will give rise to heated discussions at the Copenhagen conference.
D.Its rough estimates are meant to draw the attention of world leaders.
小题4:What does Kofi Annan say should be the focus of the Copenhagen conference?
A.How human and economic losses from climate change can be reduced.
B.How rich countries can better help poor regions reduce climate hazards.
C.How emissions of heat-trapping gases can be reduced on a global scale.
D.How rich and poor regionscan share responsibility in curbing global warming.

查看答案和解析>>

科目:高中英语 来源:不详 题型:阅读理解

We probably all know people, either at work or in our personal lives, who are really good listeners. No matter what kind of situation we’re in, they always seem to know just what to say and how to say it so that we’re not offended(被冒犯) or upset. We probably also know people who are masters at managing their emotions(情绪). They don’t get angry in stressful situations. Instead, they have the ability to calmly look at a problem and find a solution. They take criticism(批评) well, and they know when to use it to improve their performance.
People like these who have a high degree of emotional intelligence, or EI(情商). They know themselves very well, and they’re also able to sense the emotional needs of others.
As more and more people accept that emotional intelligence is just as important to professional success as technical(专业的) ability, companies are increasingly using EI when they hire and promote(提拔) someone. For example, one large cosmetics (化妆品) company recently changed their hiring process for salespeople to choose candidates(被选的人) based on emotional intelligence. The result? Salespeople hired with the new system have sold, on average, $91,000 more than salespeople selected under the old system.
Emotional intelligence is the ability to recognize your emotions, understand what they are telling you, and realize how your emotions affect people around you. Emotional intelligence also involves your perception (洞察力) of others: when you understand how they feel, this allows you to manage relationships more effectively.
People with high emotional intelligence are usually successful in most things they do. Why? Because they are the ones that others want on their team. When people with high EI send an email, it get answered. When they need help, they get it. Because they make others feel good, they go through life much more easily than people who are easily angered or upset.
The good news is that emotional intelligence can be taught and developed. Many books and tests are available to help you determine your current EI, and identify where you may need to do some work.
小题1:According to the passage, we’re all probably impressed by people who _____.
A.are ready to help others
B.are very successful in their lives
C.have high emotional intelligence
D.know how to control their temper
小题2:By mentioning the cosmetics company, the author tries to _____.
A.stress the importance of emotional intelligence
B.speak highly of its new salespeople
C.show its effective hiring system
D.explain what improvements it has made
小题3:The underlined word “they” in the fourth paragraph refers to “_____”.
A.your emotions B.people around you
C.effective relationshipsD.your opinions of others
小题4:Which statement is TRUE about people with high EI?
A.They are usually good speakers.
B.They are born to be sensitive and intelligent.
C.They don’t get angry in any situation.
D.They can understand others’ feelings well.
小题5:What’s most likely to be discussed in the paragraph that follows?
A.What emotional intelligence is.
B.How emotional intelligence can be improved.
C.Many books on emotional intelligence.
D.More people with high emotional intelligence.

查看答案和解析>>

科目:高中英语 来源:不详 题型:阅读理解

With the Tesla Roadster and other plug­in (插入式) electric vehicles hitting the road,demand is growing for accessible refueling points to recharge(充电) them. Carbon Day Automotive, a Chicago­based company,has now demonstrated(演示)a solar­powered recharging point, known as the Solar Plug­In Station,which lets motorists easily charge their cars using electricity that has been produced without any environmental damage.
The Solar Plug­In Station has gone on show in Chicago as part of the city’s bid(竞标)to host the 2016 Olympic Games. According to Carbon Day Automotive,the Solar Plug­In Station on show in Chicago is part of the vital infrastructure(基础设施) required for electric vehicles in Chicago and was the focus of a recent visit by the International Olympic Committee.
These solar­powered electricity points will be used daily to fuel the city’s electric vehicles with power from the sun. By producing the electricity from pollution­free solar cell, the CO2 emissions are reduced to zero.
“Solar energy and electric vehicles are a partnership that is one more step to reducing our dependence on foreign oil,” says Richard Lowenthal, CEO of Coulomb Technologies.Coulomb Technologies recently developed the components (部件) required for individual recharging stations,marketed as ChargePoint Networked Charging Stations.Carbon Day Automotive is the Midwest distributor for the ChargePoint stations. The Solar Plug­In Station consists of giant solar panels (电池板) that shade the tiny ChargePoint Networked Charging Station.The solar panel is connected to an underground battery pack,ready for everyday refueling.
“Without these stations it would be like driving around in a traditional car without the availability of gas stations,” says Scott Emalfarb,CEO at Carbon Day.“The day of true plug­in electric vehicles will be here sooner than most people realize and the world needs to be ready to accommodate(为……提供场地)them.”
小题1:The Solar Plug­In Station is used as part of the bid to host the Olympics mainly because ________.
A.it’s environmentally friendly
B.it makes up for the lack of electricity
C.it’s a new idea and attracts people’s attention
D.it brings convenience to electric vehicle users
小题2:We can learn from the passage that ________.
A.to recharge the electric vehicles takes a long time
B.the Solar Plug­In Station will come into use in 2016
C.the Solar Plug­In Station has gone on show internationally
D.Chicago is promoting the use of electric vehicles
小题3:According to the passage,how many of the following statements are TRUE?
a. Tesla Roadster is a kind of plug­in electric vehicle.
b. The Solar Plug­In Station uses solar power to charge all of the cars.
c. Chicago is a city,which is rich in oil.
d. The Solar Plug­In Station consists of underground battery packs.
e. Scott Emalfarb is optimistic about the future of plug­in electric vehicles.
A.2.B.3.C.4.D.5.
小题4:The passage implies that when the Solar Plug­In Station becomes popular,________.
A.more visitors will come to Chicago
B.the citizens of Chicago will be able to go to work faster
C.more space for electric vehicles will be needed
D.the cost of electric vehicles will be lower than traditional cars
小题5:What would be the best title for the passage?
A.Chicago Will Soon Be Full of Electric Vehicles
B.Chicago Calls on People to Buy Electric Vehicles
C.Chicago Fights for Its Bid to Host the 2016 Olympics
D.Chicago Shows Its Solar­powered Recharging Stations

查看答案和解析>>

科目:高中英语 来源:不详 题型:阅读理解

  In my last essay, I wrote briefly about a bathtub in the classroom. What really was the use of that bathtub? “Guys, it is Reading Workshop time now. When I call your table, get your things, please!” said Mrs. Toalson. She was holding a cup that had many sticks in it; on every stick was written each student’s name and table number.
What does she mean? Probably books, I thought. Mrs. Toalson picked a stick out of the cup and said, “Okay, Aniqa’s table; Table Two, you may get your things. ”Then my four classmates ran for the cushions(垫子)in the bathtub. Mrs. Toalson kept picking sticks and calling out different table numbers. On hearing their numbers, students would run to get cushions. Because there were not enough cushions for everyone, the last to be called had to go without. Those students sighed, “Oh! They are the lucky ones.”
Finally, Mrs. Toalson picked the last stick ; what is she going to do now?
“Kate, you may use the bathtub. ” Mrs. Toalson said. Gosh! Use the bathtub? Is Kate going to take a bath, I wondered. Kate is the girl who had pretty brown hair. She ran happily with her book to the bathtub and lay down in it. As she read, she hugged a teddy bear. I think it must be comfortable reading in a bathtub.
Except for lucky Kate, everybody had to read elsewhere. Some were sitting on the seats, some were lying down under the table, and everybody’s reading pose(姿势)was different.
Just then, my friend found me sitting at my table quietly, not doing anything. She said, “Mary, let me find you a book. ” I nodded. Then she led me to a comer of the classroom where the book-shelf was and picked a picture book for me.
Regina thought that it would be more fun to read outside on the grass. What a great idea! The next day our whole class went to the park across the street from our school. As we read, animals such as squirrels ran around us. It was amazing !
小题1: In Mrs. Toalson’s Reading Workshop, every student can learn _________.
A.brieflyB.comfortablyC.quicklyD.eagerly
小题2: Which of the following is TRUE according to this passage?
A.Mrs. Toalson told the student to sit in the bathtub as a punishment.
B.The student who used the bathtub in that class was thought to be unlucky.
C.Not every student can get a cushion in Mrs. Toalson’s Reading Workshop.
D.In Mrs. Toalson’s Reading Workshop, only the best student can lie down reading.
小题3: Who got the chance to use the bathtub in that class?
A.A student whose table was last called.
B.The student who sat at the table quietly.
C.The student who got the last cushion.
D.A student whose table was first called.
小题4: The purpose of the passage is to ________.
A.tell us how to use a bathtub in the classroom
B.introduce us a new way of teaching style
C.teach us how to organize reading activifies in class
D.show us the importance of reading poses

查看答案和解析>>

科目:高中英语 来源:不详 题型:阅读理解

Babies who are slow to gain weight in the first months of their lives generally catch up to their peers by age 13,a large UK study shows, Researchers said the results would make parents whose babies fail to put on weight quickly less worried.
The researchers looked at data from ,11,499 children who took part in a large study, It showed that 507 who were slow to gain weight in the first eight weeks of life recovered fairly quickly and had almost caught up by age 2. Another group of 480 who were slow to gain between eight weeks and nine months continued to put on weight slowly until they were seven years ,but then had a sudden increase and caught up by age 13, The different pattems of recovery between the two groups were likely due to different reasons for slow weight gain ,the researchers said, All the children were still lighter and shorter than their peers by the time they were teenagers ,but within the normal range.
The findings highlight the importance of monitoring a baby’s weight and height gain during the first few weeks and months ,but not creating anxiety with parents of slow-growing babies, said the study leader Prof Alan Emond from the University of Bristol.
“In the past, a lot of parents have been caused unnecessary anxiety by heaith professionals and this is a positive and reassuring message.”He said in many cases of slow growth where children do not follow the standard’curve’(曲线)it is just because they are following their genetic potential.
Dr Simon Newell, vice-president of the Royal College of Paediatrics and Child Health, said he broadly agreed with the concluslons of the researchers but stressed that poor weight gain was something that needed to be monitored closely, “I would encourage parents to use growth charts but if measurements show your baby is smaller than averager it may be completely normal, ”he said.
小题1:What can we know from the findings of the research?
A.All the cases of slow weight gain in the first months of the babies’ lives are caused by the same reason
B.Slow-growing babies will have the same height and weight with their peers by age13
C.Many cases of children whose growth don’t meet the growing standard curve cannot be treated as abnormal
D.The findings won’t cause parents’ anxiety so monitoring a baby’s growth from his/her birth is unnecessary
小题2:Which of the following statements is true according to the passage?
A.It’s important to monitor a baby’s weight and height gain for new parents
B.New parents should feel anxious about their baby’s weight and height gain
C.Researches still couldn’t find the reasons for slow weight gain
D.All the children’s weight and height became normal by age 13
小题3:What does the underlined word in the fourth paragraph mean?
A.Making sure something is certain to be true
B.Making someone calmer and less anxious
C.Confirming something is to happen again
D.Being sure that someone can be attracted
小题4:Which of the statements would Dr Simon Newell agree to?
A.To some degree, growth charts can help parents monitor their babies’ weight gain
B.It’s abnormal for babies are smaller than average
C.He agreed with the researchers completely
D.Babies’ weight gain can only be monitored and measured by using growth charts.
小题5:The writer wrote this passage in order to        
A.tell us how to help babies grow faster
B.explain why babies are gain weight slowly
C.report on the findings of a research
D.reduce the anxiety of some parents

查看答案和解析>>

同步练习册答案