Question

The African elephant, the largest land animal remaining on earth, is of great importance to African ecosystem(生態(tài)系統(tǒng)). Unlike other animals, the African elephant is to a great extent the builder of its environment. As a big plant-eater, it largely shapes the forest-and-savanna(大草原) surroundings in which it lives, therefore setting the terms of existence for millions of other animals that live in its habitat.
It is the elephant’s great desire for food that makes it a disturber of the environment and an important builder of its habitat. In its continuous search for the 300 pounds of plants it must have every day, it kills small trees and under-bushes, and pulls branches off big trees. This results in numerous open spaces in both deep tropical forests and in the woodlands that cover part of the African savannas. In these open spaces are numerous plants in various stages of growth that attract a variety of other plant-eaters.
Take the rain forests for example. In their natural state, the spreading branches overhead shut out sunlight and prevent the growth of plants on the forest floor. By pulling down trees and eating plants, elephants make open spaces, allowing new plants to grow on the forest floor. In such situations, the forests become suitable for large hoofed plant-eaters to move around and for small plant-eaters to get their food as well.
What worries scientists now is that the African elephant has become an endangered species. If the elephant disappears, scientists say, many other animals will also disappear from vast areas of forest and savanna, greatly changing and worsening the whole ecosystem.
【小題1】What does the underlined phrase “setting the terms” most probably mean?

A．Improving the quality.

B．Deciding the conditions.

C．Fixing the time.

D．Worsening the state.

【小題2】The passage is developed mainly by_________.

A．giving examples

B．showing the effect and then explaining the causes

C．pointing out similarities and differences

D．describing the changes in space order

【小題3】What is the passage mainly about?

A．Forests and savannas as habitats for African elephants.

B．The eating habit of African elephants.

C．Disappearance of African elephants

D．The effect of African elephants’ search for food

【小題4】What do we know about the open spaces in the passage?

A．They are home to many endangered animals.

B．They are attractive to plant-eating animals of different kinds.

C．They result from the destruction of rain forests.

D．They provide food mainly for African elephants.

Answer 1

【小題1】B
【小題2】B
【小題3】D
【小題4】B

解析試題分析：本文介紹大象對環(huán)境的影響，這主要是因為大象對食物的需求，對野生動植物都是有好處的，但科學家擔心近些年大象的數(shù)量在減少，可能也會影響到周圍的環(huán)境。
【小題1】猜詞題：從前面的句子：it largely shapes the forest-and-savanna(大草原) surroundings in which it lives,可知是“決定周圍的環(huán)境”的意思，選B
【小題2】文章結(jié)構(gòu)題：文章第一段講的是大象對環(huán)境的影響，后面解釋的是原因。選B
【小題3】主旨題：從第二段的句子：It is the elephant’s great desire for food that makes it a disturber of the environment and an important builder of its habitat.可知這篇文章講的是大象對食物的需求對環(huán)境造成的影響。選D
【小題4】細節(jié)題：從第三段的句子：In such situations, the forests become suitable for large hoofed plant-eaters to move around and for small plant-eaters to get their food as well.可知開闊的空間吸引了很多食草的動物。選B。
考點：考查科普環(huán)保類短文
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