题目内容
Snow falls in the Earth’s extreme North and South throughout the year. However， the heaviest snowfalls have been reported in the mountains of other areas during winter. Snow is even known to fall near the Equator (赤道)，but only on the highest mountains.
Snow contains much less water than rain, but much of the water the world uses comes from snow. Melting snow provides water for rivers, electric power stations and agricultural crops. In the western United States, mountain snow provides up to seventy-five percent of all surface water supplies.
Snowfall helps to protect plants and some wild animals from winter weather. Fresh snow is made largely of air trapped among the snow crystals (晶体). Because the air has trouble moving, the movement of heat is limited. Snow also influences the movement of sound waves. The surface of the snow takes in, or absorbs, sound waves. As snow grows older or if there have been strong winds, it can become hard and flat. Then, the snow，s surface will help to send back sound waves.
Snow may be beautiful, but it can be deadly. It is responsible for the deaths of hundreds of people. Many people die in traffic accidents on roads covered with snow and ice or from being seriously stuck in the winter storm. Others die from heart attacks caused by too much physical activity out in the cold.
People may not be able to avoid living in areas where it snows often. However, they can avoid becoming victims of snowstorms. People should stop driving and stay at home until the storm has passed. People living in these areas should carry emergency supplies in their vehicle. These include food，emergency medical supplies，and extra clothing to stay warm and dry.
72. Mountain snowfall _____.
A. is heavier than that in the South and the North Poles
B. has never occurred near the Equator of the earth
C. brings less of the water the world uses than rain does
D. provides up to seventy—five percent of water supplies worldwide
73. Snow protects plants and wild animals from cold weather by _____.
A. supplying much more air B. limiting heat movement
C. absorbing strong winds D. sending back sound waves
74. Snow can be deadly mainly because it can _____.
A. cause road accidents B. make people stuck in winter storms
C. lead to heart attacks D. make people victims of snowstorms
75. What will the text probably tell us following the last paragraph? _.
A. How to drive during snowstorms B. Where we can get emergency supplies
C. How to prevent heart attacks out in cold
D. Why we should stay warm and dry in winter
ABDC
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暑假作业安徽少年儿童出版社系列答案Snow falls in the Earth’s extreme North and South throughout the year. However， the heaviest snowfalls have been reported in the mountains of other areas during winter. Snow is even known to fall near the Equator (赤道)，but only on the highest mountains.
Snow contains much less water than rain, but much of the water the world uses comes from snow. Melting snow provides water for rivers, electric power stations and agricultural crops. In the western United States, mountain snow provides up to seventy-five percent of all surface water supplies.
Snowfall helps to protect plants and some wild animals from winter weather. Fresh snow is made largely of air trapped among the snow crystals (晶体). Because the air has trouble moving, the movement of heat is limited. Snow also influences the movement of sound waves. The surface of the snow takes in, or absorbs, sound waves. As snow grows older or if there have been strong winds, it can become hard and flat. Then, the snow，s surface will help to send back sound waves.
Snow may be beautiful, but it can be deadly. It is responsible for the deaths of hundreds of people. Many people die in traffic accidents on roads covered with snow and ice or from being seriously stuck in the winter storm. Others die from heart attacks caused by too much physical activity out in the cold.
People may not be able to avoid living in areas where it snows often. However, they can avoid becoming victims of snowstorms. People should stop driving and stay at home until the storm has passed. People living in these areas should carry emergency supplies in their vehicle. These include food，emergency medical supplies，and extra clothing to stay warm and dry.
【小题1】Mountain snowfall _____.
| A．is heavier than that in the South and the North Poles |
| B．has never occurred near the Equator of the earth |
| C．brings less of the water the world uses than rain does |
| D．provides up to seventy—five percent of water supplies worldwide |
| A．supplying much more air | B．limiting heat movement |
| C．absorbing strong winds | D．sending back sound waves |
| A．cause road accidents |
| B．make people stuck in winter storms |
| C．lead to heart attacks |
| D．make people victims of snowstorms |
| A．How to drive during snowstorms |
| B．Where we can get emergency supplies |
| C．How to prevent heart attacks out in cold |
| D．Why we should stay warm and dry in winter |
Penguins live together，but each pair has a little piece of ground of their own.When a penguin wants to walk through its neighbor’s ground，it must ask permission.If it does not do that，it will have to fight.Most of the time，penguins live on the water.They eat shell fish and look after their children carefully.
All penguins are good parents—the male penguins are perhaps the best parents in the world. They walk in the sea in the middle of the dark Antarctic water. They choose their wives in the dark.They can only hear them—not see them.Then the female penguins lay their eggs and go away for about two months.The males take care of the eggs.If the eggs get cold，there will be no chicks.There is no food.The snow falls heavily and the wind blows strongly—sometimes at 150 kilometers an hour.The penguins do not move.When the females return from the sea，they will not remember their husbands.It does not matter.Only one thing matters—the eggs.Male penguins never fight—unless a penguin leaves a chick for a minute.They then fight because they all want it.They are strange and wonderful birds.
1.It seems interesting and unusual that the male penguins choose their wives ______.
|
A．when the female penguins return from the sea |
|
B．just by hearing in the darkness |
|
C．each time they see the lovely females |
|
D．after they have had their own grounds |
2.Male penguins fight when ______.
|
A．they choose their wives |
|
B．they see a chick left alone |
|
C．they want to get something to eat |
|
D．they walk through their neighbors’ ground |
3.From the passage we know that ______.
|
A．penguins live a hard life |
|
B．penguins live in pairs |
|
C．penguins will fight if one walks through others’ ground without permission |
|
D．each penguin has a little piece of ground of its own |
4.The penguins choose their wives in the dark. We can infer that ______.
|
A．penguins like nights very much |
|
B．there is no daytime in that place at all |
|
C．the weather is cloudy and rainy all the year around |
|
D．the sun can’t shine there for nearly half a year every year |
5.Which of the following is NOT true?
|
A．Female penguins take care of the eggs. |
|
B．Female penguins often have their new husbands. |
|
C．Male penguins use their ears to choose wives. |
|
D．Male penguins don’t move when they take care of eggs，even though the wind often blows strongly. |