the mercy of任由--摆布或控制 查看更多

 

题目列表(包括答案和解析)

Nothing is more important than health, so it is unwise to build up our business ________ our health.

A.at the mercy ofB.at the expense of
C.in face ofD.in relation to

查看答案和解析>>


D
As they migrate(迁移),butterflies and moths choose the winds they want to fly with,and they change their body positions if they start floating in the wrong direction.This new finding suggests that insects may employ some of the same methods that birds use for traveling long distances.Scientists have long thought that insects were simply at the mercy of the wind.
Fascinating as their skills of flight are,migrating behavior has been difficult to study in insects because many long distant trips happthousands of feet above ground.Only recently have scientists developed technologies that can detect such little creatures at such great heights.
To their surprise,though,the insects weren’t passive travelers on the winds.In autumn,for example,most light winds blew from the east,but the insects somehow sought out ones that carried them south and they positioned themselves to navigate directly to their wintering homes.
Even in the spring,when most winds flowed northward,the insects didn’t always go with the flow.If breezes weren’t blowing in the exact direction they wanted to go,the insects changed their body positions to compensate.Many migrating birds do the same thing.
The study also found,butterflies and moths actively flew within the air streams that pushed them along.By adding flight speeds to wind speeds,the scientists calculated that butterflies and moths can travel as fast as 100 kilometers an hour.The findings may have real-world applications.With climate warming,migrating insects are growing in number.Knowing how and when these pests move could help when farmers decide when to spray their crops.
71.What’s the main idea of the text?
A.Insects migrate with the seasons.     B.Wind helps insects greatly in migrating.
C.Windsurfing insects have real direction.D.Scientists have trouble in observing insects.
72.Scientists originally thought that____________.
A.insects always waited for their favourable winds
B.insects chose the winds they wanted to ride
C.insects were just blown about by the wind
D.insects positioned themselves in the winds
73.It is not easy to stuay the migrating behavior of the insects because____________
A.the little creatures can fly very fast     B.they have no regular migrating courses
C.the wind’s direction is hard to foresee    D.their flight is long and high above ground
74.We can learn from the text that______________.
A.insects fly in the way birds do
B.insects travel more easily in autumn
C.insects never position themselves when flying low
D.insects rest a lot when the wind pushes them along
75.According to the passage,the findings can              
A.increase insects in number         B.instruct farmers when to spray
C.prevent climate warming       D.help protect insects

查看答案和解析>>

请认真阅读下面对话,并根据各题所给首字母的提示,在方框的右栏标有题号的横线上, 写出一个英语单词的完整. 正确的形式,使对话通顺。

Mary: I heard you had just flown in yesterday, hadn’t you?

John: Yes, but that was a t_____ experience. I wouldn’t think that I will fly again.

Mary: What made you say so?

John: Well, e____ went on OK in the f______ three hours after the plane took off. The evening meal had been served already and a film was showing. Most of the passengers were watching it.

Mary: But where were you after three hours’ flight?

John: Well, it’s a nine-hour flight from San Francisco to Shanghai, so we were righta______ the Pacific Ocean. I could almost see a jet of black smokep______ out. In the meantime the plane was bumping along, whichs______ my heart jumping in my mouth.

Mary: What happened next then?

John: Just at the mercy of wind and weather, I had been sitting on pins andn______ for almost an hourw_______ I heard the hostess through the public communication system announcing that in three quarters’ time we’d be landing at San Francisco again. And the plane was returning s______ out of technical reasons. Silence followed. Yet everyone on b______ was praying for him. When the plane at last landed safely, there broke out a loud cheer for the pilot.

查看答案和解析>>

A man accused of failing to return more than 700 children’s books to five different libraries in the county was released from prison after a book publisher agreed to post his bond (保释金) of $1,000. The publisher said, “There’s a story here. This is a man who loves books. He just can’t let go of them. He hasn’t stolen a single book. So what’s the crime? We think that Mr Barush has a story to tell. We plan to publish his story.”

    When asked why he didn’t return the books, Mr Barush said, “Well, how could I? They became family to me. I was afraid to return them, because I knew that kids or dogs would get hold of these books and chew them up, throw them around, tear the pages, spill soda on them, get jam and jelly on them, and drown them in the toilet.”

    He continued, “Books are people, too! They talk to you, they take care of you, and they enrich you with wisdom, humor and love. A book is a guest in my home. How could I kick it out? I repaired torn pages. I dusted them with a soft clean cloth. I turned their pages so they could breathe and get some fresh air.”

    “Every week I reorganized them on their shelves so they could meet new friends. My books were HAPPY books. You could tell just by looking at them. Now they’re all back in the library, on the lower shelves, on the floors, at the mercy of all those runny-nosed kids. I can hear them calling me! I need to rescue them. Excuse me. I have to go now.”

1.Why was the man put into prison?

A. Because the book publisher persuaded the police to do so.

B. Because he stole 700 children’s books from the five different libraries.

C. Because he refused to return the books that he had borrowed.

D. Because he wanted to publish his story.

2.How did the man treat books?

A. He treated them as real people.           

B. He treated them as his own children.

C. He treated them as his furniture.          

D. He treated them as his job.

3.From the passage we can learn that the man is _____.

A. a thief  B. a writer  C. crazy about books  D. unfortunate

4.What is mainly talked about in this passage?

A. A funny thief who loves stealing books.

B. A person who refuses to return borrowed books and wants to look after them.

C. A person who is crazy about books so he keeps stealing them from the library.

D. A person who may have some mental problems.

 

查看答案和解析>>

第三部分:阅读理解(共20小题;每小题2分,满分40分)

阅读下列短文,从每题所给的四个选项(A、B、C、D)中,选出最佳选项。

A man accused of failing to return more than 700 children's books to five different libraries in the county was released from prison after a book publisher agreed to post his bond(保释金)of $1,000. The publisher said, "There's a story here. This is a man who loves books. He just can't let go of them. He hasn't stolen a single book. So what's the crime? We think that Mr Banish has a story to tell. We plan to publish his story."

When asked why he didn't return the books, Mr Banish said, "Well, how could I? They became family to me. I was afraid to return them, because I knew that kids or dogs would get hold of these books and chew them up, throw them around, tear the pages, spill soda on them, get jam and jelly on them, and drown them in the toilet.

He continued, "Books are people, too! They talk to you, they take care of you, and they enrich you with wisdom, humor and love. A book is a guest in my home. How could I kick it out? I repaired torn pages. I dusted them with a soft clean cloth. I turned their pages so they could breathe and get some fresh air."

"Every week I reorganized them on their shelves so they could meet new friends. My books were HAPPY books. You could tell just by looking at them. Now they're all back in the libraries, on the lower shelves, on the floors, at the mercy of all those runny-nosed kids. I can hear them calling me. I need to rescue them. Excuse me. I have to go now."

56. Why was the man put into prison?

A. Because the book publisher persuaded the police to do so.

B. Because he stole 700 children's books from the five different libraries.

C. Because he refused to return the books that he had borrowed.

D. Because he wanted to publish his story.

57. How did the man treat books?

A. He treated them as real people.

B. He treated them as his own children.

C. He treated them as his furniture.

D. He treated them as his job.

58. From the passage we can learn that the man is _______.

A. a thief      B. a writer       C. crazy about books   D. unfortunate

59. What might happen after the man was set free?

A. He might stop borrowing books.

B. He might start a library of his own.

C. He might go on borrowing books from libraries.

 

查看答案和解析>>


同步练习册答案