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四、阅读表达
阅读下面短文，简略回答问题。
When you look at a mountain with snow on the top, it looks so beautiful. But that can change very quickly if an avalanche(雪崩) happens.
An avalanche is quite a lot of snow, ice and rocks moving quickly down a mountain, usually on slopes(斜坡) of $30°$ to $45°$. It can move at speeds from 96 km/h to 129 km/h.
Different things can make avalanches happen suddenly. About 90% of avalanches happen because of humans, like climbers and snow mobiles(雪地摩托). Strong winds, earthquakes, and even animals can also make them happen.
Avalanches happen all year round. Most of them are small, but in high mountains, they can be very large and dangerous. When they happen, the fast-moving snow, ice and rocks can cover people, all the houses and villages along the way. The snow becomes too hard to move. That can make people under it die of the cold.
However, what can we do to keep safe if we want to climb snow mountains? Education and right training can help. They can give us useful advice. For example, never start climbing when the snow begins melting(融化), especially in spring. Avalanches may happen in this season at any minute. Wait for at least 2 days to start climbing after a snowstorm. Bring useful tools, like a beacon(在线电信标台) to help others find you. Phones sometimes don't work on mountains. Keeping quiet on the mountains is also important.
Anyway, avalanches are part of nature. We need to have respect for the mountains and weather all the time.
29. How fast can an avalanche move?
30. How many reasons for avalanches does the passage mention?
31. What are the possible results of an avalanche according to the passage?
32. What can we do to keep safe if we want to climb snow mountains?
33. If you were caught in an avalanche, what would you do?
阅读下面短文，简略回答问题。
When you look at a mountain with snow on the top, it looks so beautiful. But that can change very quickly if an avalanche(雪崩) happens.
An avalanche is quite a lot of snow, ice and rocks moving quickly down a mountain, usually on slopes(斜坡) of $30°$ to $45°$. It can move at speeds from 96 km/h to 129 km/h.
Different things can make avalanches happen suddenly. About 90% of avalanches happen because of humans, like climbers and snow mobiles(雪地摩托). Strong winds, earthquakes, and even animals can also make them happen.
Avalanches happen all year round. Most of them are small, but in high mountains, they can be very large and dangerous. When they happen, the fast-moving snow, ice and rocks can cover people, all the houses and villages along the way. The snow becomes too hard to move. That can make people under it die of the cold.
However, what can we do to keep safe if we want to climb snow mountains? Education and right training can help. They can give us useful advice. For example, never start climbing when the snow begins melting(融化), especially in spring. Avalanches may happen in this season at any minute. Wait for at least 2 days to start climbing after a snowstorm. Bring useful tools, like a beacon(在线电信标台) to help others find you. Phones sometimes don't work on mountains. Keeping quiet on the mountains is also important.
Anyway, avalanches are part of nature. We need to have respect for the mountains and weather all the time.
29. How fast can an avalanche move?
It can move at speeds from 96 km/h to 129 km/h.
30. How many reasons for avalanches does the passage mention?
4/Four.
31. What are the possible results of an avalanche according to the passage?
It can cover people, houses, villages and cause death from cold.
32. What can we do to keep safe if we want to climb snow mountains?
Get education, training, bring useful tools like a beacon and keep quiet on the mountains.
33. If you were caught in an avalanche, what would you do?
I would try to move to the side, cover my mouth, and stay as calm as possible.（答案不唯一，合理即可）
答案
29. It can move at speeds from 96 km/h to 129 km/h.
30. 4/Four.
31. It can cover people, houses, villages and cause death from cold.
32. Get education, training, bring useful tools like a beacon and keep quiet on the mountains.
33. I would try to move to the side, cover my mouth, and stay as calm as possible.（答案不唯一，合理即可）
30. 4/Four.
31. It can cover people, houses, villages and cause death from cold.
32. Get education, training, bring useful tools like a beacon and keep quiet on the mountains.
33. I would try to move to the side, cover my mouth, and stay as calm as possible.（答案不唯一，合理即可）
