问题 选择题

下列四项中,正确表示了中考一条食物链的是

A.阳光

B.草

C.鹰

D.阳光玉米

答案

答案:B

题目分析:食物链反映的是生产者与消费者之间吃与被吃这种关系的,所以食物链中不应该出现分解者.食物链的正确写法是:生产者→初级消费者→次级消费者…注意起始点是生产者.

A、阳光是非生物部分,既不属于生产者也不属于消费者,食物链的概念未包括非生物部分,故不符合题意.

B、该食物链正确的表示了生产者草与消费者兔、鹰它们三者的关系,故符合题意.

C、鹰属于该食物链顶端,在兔子之后,故不符合题意;

D、阳光是非生物部分,既不属于生产者,也不属于消费者。故不符合题意。

单项选择题

People are indulging in an illusion whenever they find themselves explaining at a cocktail (鸡尾酒) party, say, that they are "in computers," or "in telecommunications," or "in electronic funds transfer". The implication is that they are part of the high-tech world. Just between US, they usually aren’t. The researchers who made fundamental breakthroughs in those areas are in a high-tech business. The rest of us are () of their work. We use computers and other new technology components to develop our products or to organize our affairs. Because we go about this work in teams and projects and other tightly knit working groups(紧密联系在一起的工作小组), we are mostly in the human communication business. Our successes stem from good human interactions by all participants in the effort, and our failures stem from poor human interactions.

The main reason we tend to focus on the()rather than the human side of the work is not because it’s more(), but because it’s easier to do. Getting the new disk drive installed is positively trivial compared to figuring out why Horace is in a blue funk (恐惧) or why Susan is dissatisfied with the company after only a few months. Human interactions are complicated and never very crisp (干脆的, 干净利落的) and clean in their effects, but they matter more than any other aspect of the work.

If you find yourself concentrating on the()rather than the(), you’re like the vaudeville character (杂耍人物) who loses his keys on a dark street and looks for them on the adjacent street because, as he explains, "The light is better there!".

The main reason we tend to focus on the()

A.technical

B.classical

C.social

D.societal

选择题