下列哪项不是植物生长需要的最多的三种无机盐 A．铁 B．磷 C．钾 D．氮

阅读下面短文，根据短文内容回答问题。

Internet is educational. Many people think children should be allowed to surf the Internet as they wish. In this way, they can look through different subjects on different kinds of websites according to their own interest. But in my opinion, children should always be watched while surfing the Internet.

Many websites have information and pictures that children should not see. There are many things that children don’t understand. All of these may have some bad influence on children’s development. Also, it is more dangerous to let children use chat rooms by themselves. Many parents tell their children not to talk to strangers on the street, so they should be careful of whom their children talk to on the Internet, too. What’s more, sitting in front of a computer for a long time isn’t good for children’s eyes, so parents should monitor (监视) the time that children spend on the Internet.

In a word, children should be kept away from anything that could be bad for them. I strongly believe that it is necessary for parents to watch their children when they use the Internet.

小题1: Is the Internet educational for children all the time?

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小题2:What do parents tell children to do when they meet strangers on the street?

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小题3: Why shouldn’t children sit in front of a computer for a long time?

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小题4:Who can help children stay away from the bad influence of the Internet?

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小题5:What does the writer want to tell us in the passage?

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有一个函数具备以下两个特点：（1）与直线y=-x有两个交点；（2）图象上任意一点到两坐标轴的距离的积都为5，请写出这个函数解析式______．

“The pen is more powerful than the sword(剑).” There have been many writers who used their pens to fight things that were wrong. Mrs Harriet Beecher Stowe was one of them. She was born in the U.S.A. in 1811.One of her books not only made her famous but has been described as one that excited the world, and was helpful in causing a civil war and freeing the enslaved race. The civil war was the American Civil War of 1861,in which the Northern States fought the Southern States and finally won.

This book that shook the world was called Uncle Tom’s Cabin. There was a time when every English-speaking man, woman, and child has read this novel that did so much to stop slavery. Not many people read it today, but it is still very interesting. The book has shown us how a warm-hearted writer can arouse(唤起) people’s sympathies. The author herself had neither been to the Southern States nor been a slave. The Southern Americans were very angry at the book, which they said did not at all represent true state of affairs, but the Northern Americans were wildly excited over it and were so inspired by it that they were ready to go to war to set the slaves free.

41．According to the passage______.

A．every English-speaking person has read Uncle Tom's Cabin

B．Uncle Tom's Cabin was not very interesting

C．those who don't speak English cannot have read Uncle Tom's Cabin

D．the book Uncle Tom's Cabin did a great deal in the American Civil War

42．How old was Mrs Harriet Beecher Stowe when her world famous book was published?

A．About sixty years old.    B．Over fifty years old.

C．In her forties.           D．Around twenty years old. 43.What do you learn about Mrs Harriet Beecher Stowe from the passage?        

A．She had been living in the north of America before the American Civil War 

broke out.

B．She herself encouraged the Northern Americans to go to war to set the slaves free.

C．She was better as writing as swinging(挥舞)a sword.

D．She had once been a slave.

44．What can we learn from the passage?　　

A．We needn’t use weapons to fight things that are wrong.

B．A writer is more helpful in a war than a soldier.

C．We must understand the importance of literature and art.  

D．No war can be won without such a book as Uncle Tom's Cabin .

施工人员在现场作业中，不得将安全帽脱下，搁置一旁，或当坐垫使用。

直升机加油时，如有旅客在飞机内，加油员应（）。

A.立即停止加油并撤离

B.立即停止加油并告知航空公司直升机严禁载客加油

C.继续加油

D.以上都可以