Question

【題目】The largest land animal remaining on the earth, the African elephant is of much importance to African ecosystem. Unlike other animals, the African elephant is to a great extent the builder of its environment. As a giant plant-eater, it significantly shapes the forest-and-savanna (大草原) surroundings in which it lives, therefore deciding the conditions of existence for millions of other animals that live in its habitat.

It is the elephant’s great desire for food that makes it both 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 underbushes, as well as pulls branches off big trees. This results in numerous open spaces in not only deep tropical forests but also the woodlands that cover part of the African savannas. In these open spaces are numerous plants in various stages of growth, which 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 create 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-sized plant-eaters to obtain their food as well.

Scientists are worried now that the African elephant has become an endangered species. If the elephant dies out, scientists say, many other animals will also disappear from vast areas of forest and savanna, greatly changing and worsening the whole ecosystem.

【1】What is the passage mainly about?

A. Disappearance of African elephants.

B. Forests and savannas as habitats for African elephants.

C. The effect of African elephants' search for food.

D. The eating habit of African elephants.

【2】The African elephant influences the ecosystem in the following ways except that .

A. it creates open areas in deep tropical forests as well as woodlands

B. it pulls off the branches and leaves, shutting out the sunshine

C. its eating habit can be made use of by large-hoofed and small-sized animals

D. it encourages some kinds of plants growing in an indirect way

【3】According to the passage, which of the following statements is true?

A. Numerous grown plants are the favorites of plant-eaters.

B. The extinction of the African elephant has nothing to do with the ecosystem.

C. Quantities of plants are consumed by African elephants, including branches and underbushes.

D. The forest floor in rain forests is scarcely dotted with new shoots.

【4】The passage is developed mainly by .

A. presenting the changes in time order

B. making comparisons and giving examples

C. classifying similarities and differences

D. showing the effect and then explaining the reasons

Answer 1

【答案】

【1】C

【2】B

【3】C

【4】D

【解析】

試題分析：本文主要敘述的是非洲大象對(duì)于非洲草原的生態(tài)系統(tǒng)有巨大的影響，同時(shí)分析了原因。

【1】C 主旨大意題。本文主要講述的是非洲大象對(duì)于非洲生態(tài)系統(tǒng)的重要作用，，非洲大象在尋找食物的時(shí)候會(huì)把很多樹木掀翻，這樣就給地表植物帶來(lái)陽(yáng)光的照射。這對(duì)整個(gè)非洲草原的生態(tài)系統(tǒng)影響很大。故C正確。

【2】B 細(xì)節(jié)題。根據(jù)第三段1、2句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 create open spaces, allowing new plants to grow on the forest floor.可知樹枝會(huì)遮住陽(yáng)光，讓地表植物無(wú)法生長(zhǎng)。非洲大象把樹木掀翻，這就給地表植物吸收陽(yáng)光帶來(lái)了機(jī)會(huì)。C項(xiàng)的說(shuō)法與之相反。故C項(xiàng)說(shuō)法是錯(cuò)誤的。

【3】C 細(xì)節(jié)題。根據(jù)文章第二段第二句In its continuous search for the 300 pounds of plants it must have every day, it kills small trees and underbushes, as well as pulls branches off big trees.可知非洲大象每天要吃掉大量的食物，包括灌木和小樹。故C正確。

【4】D 寫作手法題。本文在敘述非洲大象對(duì)生態(tài)系統(tǒng)的重要性的時(shí)候，主要是通過(guò)介紹它的影響以及解釋原因這兩種方法著手的。例如：第二段主要介紹影響，第三段解釋原因。故D正確。