- When will the Shanghai World E xpo end? - October 31. A. On B. In C. For D. At 题目和参考答案——青夏教育精英家教网—

精英家教网 > 初中英语 > 题目详情

— When will the Shanghai World E xpo end?

　　— ______ October 31.

　　A. On B. In C. For D. At

练习册系列答案

年级	高中课程	年级	初中课程
高一	高一免费课程推荐！	初一	初一免费课程推荐！
高二	高二免费课程推荐！	初二	初二免费课程推荐！
高三	高三免费课程推荐！	初三	初三免费课程推荐！
更多初中、高中辅导课程推荐,点击进入>>

相关习题

科目：初中英语 来源： 题型：

Modest men are never ______ of the progress they have made.

　　A . proud B. afraid C. certain D. thinki ng

查看答案和解析>>

科目：初中英语 来源： 题型：

阅读理解,阅读下列短文，从每题所给的A、B、C、D四个选项中选出最佳选项。

　Dogs are known for their sense of smell. They can find missing people and things like bombs and illegal drugs. Now a study suggests that the animal known as man’s best friend can even find bladder (膀胱) cancer.

　　Cancer cells (细胞) are thought to produce chemicals with unusual smells. Resea rchers think dogs have the ability to smell these smells, even in very small amounts, in urine (尿). The sense of smell in dogs is thousands of times better than in humans.

　　The study follows reports of cases where, for example, a dog showed great interest in a growth on the leg of its owner. The man was later found to be skin cancer.

　　Carolyn Willis led a team of researchers at Amersham Hospital in England. They trained different kinds of dogs for the experiment. The study involved urine collected from bladder cancer patients, from people with other diseases and from healthy people.

　　Each dog was tested 8 times. In each test there were 7 samples for the dogs to smell. The dog should signal the one from a bladder cancer patient by lying down next to it. Two cocker dogs were correct 56 percent of the time. But the scientists reported an average success rate of 41 percent.

　　The British Medical Journal published the research. In all, 36 bladder cancer patients and 108 other people took part. During training, all the dogs reportedly even identified(认出)a cancer in a person who had tested healthy before the study. Doctors found a growth on the person’s right kidney (肾).

　　Carolyn Willis says dogs could help scientists identify the combined (合成) chemicals produced by bladder cancer. That information could then be used to develop machines to test for the chemicals. The team also plans to use dogs to help identify markers for other kinds of cancer.

　　1. What’s the general idea of the text?

　　A. Dogs have a good sense of smell B. Dogs can help cure cancer

　　C. Dogs can smell cancer D. Dogs help perform experiments

　　2. According to the text, people who suffer bladder cancer_________.

　　A. often have urine with unusual sme ll B. probably like smoking in their life

　　C. can easily make dogs lie down D. are likely to die within nine years

　　3. The underlined word “involved” in the text is closest in meaning to _________.

　　A. showed B. proved C. used D. preferred

　　4. What can we know from the last paragraph?

A. Dogs can only smell bladder cancer.

B. Dogs have a good knowledge of cancer.

C. Scientists might invent some machines to test cancer.

D. Cancer doesn’t have any sign in the beginning.

查看答案和解析>>

科目：初中英语 来源： 题型：

Nobody knows ______ yesterday.

A. how the accident happens B. how does the accident happen

C. how the accident happened D. how did the accident happen

查看答案和解析>>

科目：初中英语 来源： 题型：

阅读短文，根据短文内容回答问题。

We’ve all heard of mermaids. They are the beautiful half-human, half-fish creatures(生物). They have the head and body of a human and the tail of a fish. We also know that mermaids only exist in fairy tales. But where did all the stories about these creatures come from? If you have ever seen a manatee, then you might have an idea.

Manatees, which are also called sea cows, are mammals(哺乳动物) that live in the sea. Since they are mammals, they have to swim up to the surface to breathe air. Many people believe that the story of the mermaid began with the ancient sailors who saw the manatees putting their heads out of the water to breathe. Because manatees are upright when they do this, it looks like they are standing. If a sailor saw a manatee doing this from far away across the sea, it is possible that the sailor would mistake the manatee for a creature that is half-human, half-fish.

Mermaids are described as having very long hair. This is probably because manatees like to swim up to the surface of the water in areas where there is sea grass. Manatees eat all kinds of plants in the sea, including sea grass. The sea grass around the manatee’s head when they eat could create a picture of long hair.

Manatees also have powerful tails that are very similar to the fish-like tail of a mermaid. The sailors probably watched manatees come up for air and then swim back below the surface, using their paddle-shaped tails. This would explain why the sailors thought mermaids had fish-like tails.