题干

达尔文在著名的《物种起源》一书中讲了一个饶有兴趣的“猫与牛”的故事。英国的牛主要靠优质的红三叶草为饲料,而红三叶草的兴衰与给它传粉的丸花蜂有很大关系。奇妙的是,丸花蜂的多少,又决定于田鼠的数量,因为田鼠吃蜂房和蜂幼虫,田鼠势旺丸花蜂便衰败。而猫吃田鼠,猫多了,田鼠就少了,丸花蜂就多了,红三叶草就兴盛了,牛就养壮了。一切生物处于普遍联系之中,这是辩证法最基本的观点,表面看起来不相关的生物却盛衰依存,祸福倚伏。
(1) 写出故事中最长的一条食物链:
(2)这个故事说明了一个什么问题?

上一题 下一题 0.0难度 选择题 更新时间:2014-04-29 04:51:20

答案(点此获取答案解析)

(1)红三叶草→丸花蜂→田鼠→猫
(2)自然界的动物和植物在长期生存与发展的过程中,形成了相互适应相互依存的关系。

同类题2

Choose the best answer to complete the passage.

    In our country we think being modest(谦虚的) is a virtue(美德) and being proud is a bad thing. One day, I heard an American boy say to a Chinese student, “You speak very good English.” But the girl answered, “No, no. My English is very poor.” The foreigner was quite 1 at the answer. Thinking he had not made himself understood or the girl had not heard him 2. He said, “Yes, indeed, you speak very well.” 3 the girl still kept saying, “No.” In the end the American boy could not understand and didn't know 4 to say.

    What's wrong with the girl's answer? She didn't 5 a compliment(恭维) in the same way as the American people do. She should answer “Thank you” instead of “No”. She 6 understood what the American boy had said, but she thought she should be modest. In the 7, people will feel 8 and confident when they are praised. So if someone says the 9 you have cooked are very delicious, you should say, “Thank you”.

    If you are modest and say, “No, I'm 10 I can't do it well”, while working in a western country, people may think that you really can not do it. If you often say, “No”, you'll certainly be looked down upon by 11. When asking 12 a job, if one says something like, “Yes, I can certainly do it” instead of “Let me have a try”, he or she will 13 get it. So in the west, you should be brave to show your self-confidence. In my opinion, being confident does not 14 being proud, so sometimes you should be confident 15 being modest.