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问题 选择题

— What about learning English by ourselves?　

— ______. [ ]

A. Good idea　　

B. Not at all　　　

C. Thanks　　　

D. That's all right

答案

答案：A

填空题

野兔靠吃野菜生活，狼以野兔为食，狼一旦碰到老虎，也就成了牺牲品。老虎死后，又成了细菌的乐园；不用多久，尸体就被分解得精光，变成了二氧化碳、水和无机盐，返回到大自然中，又成了植物制造食物的原料。所以兔、虎、狼、细菌，归根结底都是靠植物生活的。  

（1）请写出这段话描述的生态系统中的食物链：_____________。    

（2）在此生态系统的物质循环中，植物是生产者，消费者是_________，分解者是___________。  

（3）如果大量捕杀狼和虎后，野兔的数量是先_________后__________，因此，生态系统中的生物数量和比例必须保持______________才能保持生态平衡。

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问答题

Imagine you have two candidates for a job. Their CVs are equally good, and they both give good interview. You cannot help noticing, though, that one is pug-ugly and the other is handsome. Are you swayed by their appearance If you were swayed by someone’s looks, would that be wrong In the past, people often equated beauty with virtue and ugliness with vice.Even now, the expression “as ugly as sin” has not quite passed from the language. There is, of course, the equally famous expression “beauty is in the eye of the beholder”, to counter it. Most beholders agree what is beautiful-and modern biology suggests there is a good reason for that agreement. Biology also suggests that beauty may, indeed, be a good rule of thumb for assessing someone of either sex. Not an infallible one, and certainly no substitute for an in-depth investigation. But, nevertheless, an instinctive one, and one that is bound to contribute to the advantage of the physically well endowed.
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