问题 判断题

生态系统的自我调节能力很强,生态是不会受到破坏的。

答案

题目分析:生态系统具有一定的自我调节能力,但是这种能力是有一定限度的,当超过这种限度后,生态系统就会遭到破坏。生态系统的自动调节能力是由生态系统的生物种类和数量决定的,即与营养结构的复杂程度(即:食物链和食物网)有关,食物链(网)中的生物都有其适宜的环境,当环境剧烈变化后将不能适应而死去,这样就会导致食物链(网)被破坏(即:破坏营养结构被破坏).从而使自动调节能力下降甚至消失.

句型转换

阅读短文,完成下列各题。

Once there was an old farmer, with a horse which was almost as old as himself. He set out one morning with his son to sell the horse before it died. Father and son walked, because the farmer did not want the horse to be too tired.

  Two men on the road said, "Why are you walking, farmer? You have a horse, It's a long way to market. "The farmer thought that it was true, so he rode on the horse, while his son walked.

  Then they met two old women, "What are you doing up there, farmer? Can't you see how tired the boy is?" So the farmer got down, and his son rode instead.

  Next, an old men stopped them and said, "Why are you walking, farmer?  It's too hot for an old man like you to walk today," So the farmer got up behind his son, and they rode on.

Some time later, a young woman passed them, "Why aren't you walking?" she said, "It isn't far to the market. Let your poor horse have a rest." So the farmer, and his son, got down once again.

It is a fact that you cannot please all the people all the time.

简略回答问题。

小题1:Why did the father and son walk first? _________________________.

小题2:What does the story tell us?  _____________________

小题3:He set out one morning with his son.  (划线部分提问)

______  ______  he set out with his son?

小题4:You have a horse (否定句)

You _______   _________  a horse.

小题5:She said, "It isn't far to the market.”(改为宾语从句)

She said _______   _______ far to the market.

单项选择题