Many a professor _____ looking forward to visiting Germany now. Many scientists _____ studied animals and plants in the last two years.

A. is; have      B. is; has       C. are; have      D. is; are

People with bigger brains ftend to score higher on standardized tests of intelligence， according to new study findings.

However， the study author Dr Michael A.McDaniel of the Virginia Commonwealth University in Richmond emphasized that these findings represent a general trend， and people with small heads should not automatically believe they are less intelligent. For instance， Albert Einstein’s brain was “not particularly large”， McDaniel noted. “There’s some relationship between brain size and intelligence on the average， but there’s plenty of room for exceptions，” he said.

Interest in the relationship between brain size and intelligence grew in the1830s，  when German anatomist(解剖学家) Frederich Tiedmann wrote that he believed there was “an unquestionable connection between the size of the brain and the mental energy displayed by the individual man”. Since that statement， scientists have conducted numerous studies to determine if Tiedmann’s  assertion was， in fact， correct. Most studies have looked into the link between head size and intelligence. More recently， however， researchers have published additional studies on brain size and intelligence， measured using MRI scan(核磁共振成像扫描).

For his study， McDaniel analyzed more than 20 studies that looked into the relationship between brain size and intelligence in a total of 1,530 people. The studies showed that on the average， people with larger brain volume tended to be more intelligent. The relationship between brain volume and intelligence was stronger in women than men， and in adults than in children. McDaniel notes in the journal Intelligence.

McDaniel is not sure why the relationship was stronger for adults and women. “Other research has shown that women， on the average， tend to have smaller brains than men， but score just as well—if not higher—in tests of intelligence，” he said.

McDaniel insisted that the relationship between brain size and intelligence is not a “perfect” one. “One can certainly find lots of examples of smaller-sized people who are highly intelligent，” he said， “But， on the average， the relationship holds.”

1.. What does the text mainly talk about？

A.MRI scans are applied to intelligence.

B. On the average， a bigger brain means higher IQ.

C. Dr McDaniel did well in his intelligence study.

D. Scientists are interested in Tiedmann’s idea.

2. By mentioning Albert Einstein， the writer wants to show　　　　.

A. Albert Einstein was intelligent

B. the result of intelligence test was false

C. being hard working is more important than intelligence

D. brain size doesn’t necessarily decide the level of intelligence

3. The underlined word “assertion” in Para. 3 probably means “　　　　”.

A. experiment   B. statement   C proof       D. demand

4. After Frederich Tiedmann wrote his article， 　　　　.

A. many scientists agreed with him

B. numerous studies have failed to prove his idea

C.MRI scan became popularly used

D. lots of researchers were interested in the connections between head size and intelligence

5. According to the text， Dr McDaniel’s study　　　　.

A. proves Tiedmann’s idea was completely true

B. shows women are smarter than men

C. involves many studies and a lot of people

D. explains why people with smaller brains are clever

 

The damming of river systems in the northwestern United States has had damaging effects on salmon(鲑鱼). In the spring young salmon, called smolts, drift into rivers from smaller streams. They swim with the current downstream heading for the Pacific Ocean. Before the large-scale constructions of dams(水坝), the young salmon used the strong flow from melting snows to get to the sea in between six and twenty days. It is necessary to do this because during these days the smolts’ bodies undergo the physiological changes for adaptation to salt water.

Unfortunately, the current has become very slow due to the construction of numerous dams. Companies operating the dams also intentionally slow the current. They store the water from the melting snow until the winter, when more electric power is needed. The net result is that many of the young fish do not survive the now sixty-day trip to the sea. Consequently, there are fewer adult salmon to migrate(回游) back up the rivers for breeding. When the time comes for the salmon to return, they again face the problem of dams. As fewer adult salmon are able to get back to their cool upstream water, they fail to produce a sufficiently new generation of salmon.  This cycle could eventually lead to the extinction of the fish.

Attempts are being made to transport the young salmon down river by boats. However, many scientists think that this artificial method of getting the fish to the sea kills more than it saves. Another suggestion, recently proposed by environmentalists, is to increase the rate of water flow. This would be a partial（部分的） solution to the declining salmon numbers. One method of doing this would call for releasing water from upstream dam. This would speed up the downstream movement of the smolts.

Another method would be to reduce the water level in the dams for a period in the spring when the smolts are migrating downstream. This would also increase the flow rate temporarily without requiring large amounts of water and, thus, enable the young salmon to move downstream faster. Unfortunately, both of these proposals have met with criticism from the power companies, which strongly suggests the uncertain fate of the salmon in the region.

76. What’s the main topic of the passage?

A. The failure of adult salmon to reproduce.

B. The importance of smolts returning upstream.

C. The need for smolts to reach salt water quickly.

D. The harm caused to salmon by river damming.

77. The passage discusses all of the following methods of dealing with salmon issue EXCEPT _____.

A. carrying the fish in boats

B. allowing water to be released from upstream dams

C. dropping water levels in dams

D. breeding salmon

78. In paragraph 3, what does the author mean by the statement that many scientists think that this artificial method of getting the fish to the sea kills more than it saves?

A. Saving fish is artificial.

B. More fish die when transported than would die otherwise

C. Artificial methods of transportation give salmon the chance to get adapted to salt water.

D. The sea kills more fish than are saved by transportation.

79. Which of the following statements would the author most probably agree with?

A. The salmon problem is likely to continue.

B. A solution to the salmon problem will be found in the near future.

C. Salmon will be extinct very quickly. 

D. The government should step in and provide a way out.

 

Many people go to school for an education. They learn languages, history, politics, geography, physics, chemistry and mathematics. Others go to school to learn a skill so that they can make a living. School education is very important and useful. Yet, no one can learn everything from school. A teacher, no matter how much he knows, can not teach his students everything they want to know. The teacher’s job is to show his students how to learn. He teaches them how to read and how to think. So, much more is to be learned outside school by the students themselves.

It is always more important to know how to study by oneself than to memorize some facts or a formula(公式). It is actually quite easy to learn a certain fact in history or a formula in mathematics. But it is very difficult to use a formula in working out a math problem. Great scientists before us didn’t get everything from school .Their teachers only showed them the way. Edison did not even finish primary school. But they were all so successful. They invented so many things for mankind. The reason for their success is that they knew how to study. They read books that were not taught at school . They would ask many questions as they read. They did thousands of experiments. They worked hard all their lives, wasting not a single moment. Above all , they knew how to use their brain.

1. To work out a math problem, you need to know __________.

A．only a certain formula

B．how to memorize some facts

C．only some facts

D．the method to work it out

2. Why were many scientists so successful?

A．They received good education.

B．They were very clever.

C．They knew how to learn.

D．They learned lots of facts and formulas.

3.How did great scientists study?

A．They read a lot of books and asked many questions while reading.

B．They did thousands of experiments.

C．They always worked hard and never wasted time.

D．All of the above.

 

The scientific research on how to protect the rare animals is ________. Many scientists are working hard to find new way to raise the animals by man.

  A. in danger                        B. in control                  C. in order                     D. in progress