题型:阅读理解 题类:常考题 难易度:普通
湖南省浏阳一中、攸县一中2016-2017学年高二下学期英语12月联考试卷
The African elephant, the largest land animal remaining on earth , is of great importance to African ecosystem(生态系统). 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(栖息地).
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 underbushes, 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.
see relax north plant show health with but much science |
The "Great Green Wall of China" project is over forty years old. In this project, people plant trees in {#blank#}1{#/blank#} part of China. Why are trees so important to us?
Because it is healthy to live around trees. They can keep us {#blank#}2{#/blank#}, just like doctors. So we call them "doctor trees".
Trees can clean the air. For people in large cities {#blank#}3{#/blank#} air pollution, trees can be very important. Workers are {#blank#}4{#/blank#} trees not just in city parks {#blank#}5{#/blank#} also along streets to help clean the air.
Some {#blank#}6{#/blank#} think that trees not just help clean the air. They are also good for our health. A study {#blank#}7{#/blank#} that people in hospitals feel better when {#blank#}8{#/blank#} trees from their rooms. And people with trees near their homes usually exercise more.
Scientists are also studying the healthy effects (作用) of trees on human minds. One effect of trees is that they make people feel happy and {#blank#}9{#/blank#}. When people go through the neighborhood with more trees, they will walk slower and talk {#blank#}10{#/blank#} often with each other.
Of course, another good effect is that "doctor trees" work for free! Writing 3
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