2015年成人高考高起点英语冲刺试题（5）
发布时间：2012/6/13 9:20:23 来源：城市网学院 编辑：ziteng
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C
We know that many animals do not stay in one place. Birds, fish and other animals move from one place to another at a certain time. They move for different reasons:most of
them move to find food more easily,but some move to get away from places that are too crowded.
When cold weather comes,many birds move to warmer places to find food. Some fishes give birth in warm water and move to cold water to feed. The most famous migration(迁徙) is probably the migration of one kind of fish,which is called salmon(大马哈鱼). This fish is born in fresh water but it travels many miles to salt water. There it spends most of its life.
When it is old,it returns to its birthplace in fresh water. Then it gives birth and dies there. In northern Europe, there is a kind of mouse. They leave their mountain home when it becomes too crowded. They move down to the low land. Sometimes they move all the way to the seaside,and many of them are killed when they fall into the sea.
Recently,scientists have studied the migration of a kind of lobster(龙虾). Every year, when the season of the bad weather arrives,the lobsters get into a long line and start to walk across the bottom of the ocean. Nobody knows why they do this,and nobody knows where they go.
So,sometimes we know why humans and animals move from one place to another,but at other times we don't. Maybe living things just like to travel.
43. Which of the following is TRUE about salmons? ( )
A. They give birth in warm water.
B. They feed in cold water.
C. They spend most of their life in salt water.
D. Thev die in salt water.
44. What kind of animal moves to get away from places that are too crowded? ( )
A. A kind of bird. B. A kind of fish.
C. A kind of lobster. D. A kind of mouse.
45. What do the lobsters do in the season of bad weather? ( )
A. They move across the bottom of the ocean.
B. They line up to find food.
C. They go to where the weather is nice.
D. The travel from one place to another in the sea.
46. Which of the following is the best title of the passage7 ( )
A. Animals Like Traveling B. Migration of Animals
C. Life of Animals D. Animals and Humans
D
Look at the slopes(斜坡) of a hill on a rainy day. You will see many streams of muddy(泥泞的) water running down the slopes. The water is muddy because it washes away soil from the hill slopes. When the soil is carried away by water we say that the soil is losing.
Loss of soil takes place most easily on hill slopes. Rain water runs down slopes quickly and carries plenty of soil with it. Loss of soil can also take place on flat,open land.
Plants cannot grow on such land because there is not enough soil on it to give them the things they need. Plants need water and salts from the soil.
One way of stopping loss of soil on flat,open ground is to grow small plants such as grasses. These plants are called cover crops. Their roots hold the soil tightly together. The rain water cannot wash away the soil.
Loss of soil on slopes can be stopped in a number of ways. One way is to cut a slope into "steps" called terraces. Water carrying soil cannot run straight down the slope now. It has to run down the terraces. This slows down the flow of the water. Most of the soil in the water is left behind on the terraces. Water can carry away the soil only if it is flowing fast.
In this way, the soil washed away from the upper part of the slope will be let on the terraces. The edges of the terraces can also be raised. These will hold back the rain water and the soil it carries.
47. Loss of soil might happen when________. ( )
A. it rains B. the soil is muddy
C. there is plenty soil D. there is a stream
48. To stop loss of soil on flat land we should ________ . ( )
A. plant trees B. grow grasses
C. cover the land D. water the soil
49. Terraces is used to (
A. grow crops
B. carry the soil
C. divide the slopes
D. slow down the water flow
50. The raised edges of terraces help________ ( )
A. stop the loss of rain
B. hold back the soil
C. keep the water flow
D. flood the land
