问题 实验题

(10分)阅读下面资料,然后回答问题:

藻类的快速生长称为水华。当一个湖泊或池塘中水里的营养物质如氮、磷等过度增加,将造成水体富营养化。水体富营养化会加快藻类生长速度。某些自然事件和人类的活动都会增加水体富营养化的速度。例如:农民在田间施肥、一些工业废水、家庭废水和一些设计拙劣或老化的化粪系统使养分渗漏到土壤中,随土壤地表水最终流入湖泊和池塘,导致藻类的快速生长,形成水华。湖泊或池塘中,藻类的快速生长挡住水表层以下的植物阳光,那些生物会死亡并沉到水的底部。然后如细菌等生物就会降解死亡的植物的尸体,并大量繁殖。水中的氧气很快被细菌耗尽,鱼和水中的其他生物会因缺氧而死亡。仅存的生命就是生活在水面上的藻类。海洋也会因为藻类的大量繁殖而形成赤潮。

⑴为什么水体富营养化会使藻类植物的生长加快?                            

                                                                     

⑵文中的细菌在这个湖泊或池塘生态系统中属于                   ,它们通过

              作用,降解死亡的植物和藻类的尸体,同时消耗水中大量的氧气。

⑶湖泊或池塘中水表层以下植物死亡的直接原因是                   ,而鱼和水中其他动物死亡则是因为                   

答案

⑴富营养的水中含有的氮、磷是藻类植物生长所必需的

⑵分解者  分解   ⑶没有阳光  缺少氧气

题目分析:(1)水体富营养化是指水体中含氮、磷的化合物过多,这些化合物是水生植物生长、发育的养料。因此水体富营养化会使藻类植物的生长加快。

(2)分解者是指细菌和真菌等营腐生生活的微生物,它们能将动植物残体中的有机物分解成无机物归还无机环境,促进了物质的循环。

(3)根据题意湖泊或池塘中植物和其他藻类植物死亡的直接原因是缺少光照,而鱼和水中其他生物死亡则是因为缺少氧气。

阅读理解

阅读理解。

     Women are, on the whole, more verbal than men. They are good at language and verbal reasoning, while

men tend to be skilled at tasks demanding visual-spatial abilities. In fact, along with aggression, these are the

most commonly accepted differences between the sexes.

     Words are tools for communicating with other people, especially information about people. They are mainly

social tools. Visual and spatial abilities are good for imagining and manipulating objects and for communicating

information about them. Are these talents programmed into the brain? In some of the newest and most

controversial research in neurophysiology, it has been suggested that when it comes to the brain, males are

specialists while women are generalists.

     But no one knows what, if anything, this means in terms of the abilities of the two sexes. Engineering is

both visual and spatial, and it's true that there are relatively few women engineers. But women become just as

skilled as men at shooting a rifle or driving a car, tasks that involve visual-spatial skills. They also do equally

well at programming a computer, which is neither visual nor spatial. Women do, however, seem less likely to

fall in love with the objects themselves. We all know men for whom machines seem to be extensions of their

identity. A woman is more likely to see her car, rifle, or computer as a useful tool, but not in itself fascinating.

1. According to the passage, women are usually good at _____.

A. body language

B. logical reasoning

C. tasks demanding for the use of words

D. both A and B

2. The word "accepted" in the last sentence of the first paragraph roughly means _____.

A. believed

B. assumed

C. received

D. refused

3. In the authors' opinion, visual and spatial abilities are good for _____.

A. achieving one's objects

B. mind and body

C. programming talents into the brain

D. imagination and communication

4. All the following tasks involve visual-spatial skills EXCEPT _____.

A. imagining and handling objects

B. providing a computer with a set of instructions

C. shooting a gun and driving an automobile

D. planning and making things as an engineer does

5. Why do women seem less likely to fall in love with the objects themselves?

A. Because they have no visual-spatial skills.

B. Because they are only good at language and verbal reasoning.

C. Because they are less likely to see their charming or interesting aspects.

D. Because they rarely use machines such as cars, rifles, computers, etc.

填空题