题目

英语阅读练习
Do you know why different animals or pests(昆虫) have their special colors?Colors in them seem to be used mainly to protect themselves.
Some birds like eating locusts(蝗虫),but birds cannot easily catch them.Why?It is because locusts change their colors together with the change of the colors of crops(庄稼).When crops are green,locusts look green.But as the harvest time comes,locusts change to the same brown color as crops have.Some other pests with different colors from plants are easily found and eaten by others.So they have to hide themselves for lives and appear only at night.
If you study the animal life,you'll find the main use of coloring is to protect themselves.Bears,lions and other animals move quietly through forests.They cannot be easily seen by hunters(猎人).This is because they have the colors much like the trees.
Have you ever noticed an even stranger act?A kind of fish in the sea can send out a kind of very black liquid(液体)when it faces danger.While the liquid spreads over(散开),its enemies(敌人) cannot find it.And it immediately swims away.
1：Why do locusts change their colors?____________
2:How many animals who can't change protect themselves?_____________
3:A ccording to the passage ,what colour may locusts be in summer?_____________
4:What other ways can animals protect themselves?(you may use Chinese here)________

提问时间：2020-07-31

答案

你知道为什么不同的动物或害虫(昆虫)有自己特别的颜色吗?他们的色彩似乎是主要用于保护自己.
一些鸟喜欢吃蚱蜢(蝗虫),但鸟儿无法轻易抓到他们.为什么?那是因为蝗虫改变它们的颜色连同庄稼颜色的改变(庄稼).当农作物是绿色,蝗灾是绿色的.但是当收获季节来到的时候,蝗虫就变成了跟庄稼一样的黄棕色.其他一些与作物有着不同颜色的害虫很容易被别人发现和吃掉.所以他们不得不藏匿起来的生活和在晚上才出现.
如果你研究过动物的生活,你会发现主要利用色彩是保护自己.熊,狮子和其他动物静静地穿过森林.他们不容易被猎人(猎人).这是因为他们有和树林一样的颜色.
你曾注意过这样一个很陌生的行为吗?一种海中的鱼可以发出一种很黑的液体(液体)在面临危险.当液体四散(散开),它的敌人(敌人)很难发现它.而且它马上游开了.
问题:1:为什么蝗虫改变自己的颜色吗?____________
2:有多少动物谁不能改变保护自己?_____________
3:根据上下文,什么颜色可能会在夏天?_____________蝗虫
4:在其它方面有什么动物能保护自己?(你可以用在这里的中国人)全国
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