题目内容

Listen to a talk about an environmental problem on Mount Qomolangma and choose the best answer to each of the questions.1. According to the talk, how can you find the way to the Base Camp on Mount Qomolangma?[音频]

A. By following other climbers.
By following the tents selling food.
C. By following the rubbish left behind.
D. By following the tents selling equipment.

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Listen to a talk about an environmental problem on Mount Qomolangma and choose the best answer to each of the questions.2. Why did China close its base on Mount Qomolangma?[音频]

A. The bad weather made it dangerous for climbing.
B. The amount of waste was harming the environment.
C. There was a lack of volunteers to guide the climbers.
D. The base could not provide food for so many climbers.

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Listen to a talk about an environmental problem on Mount Qomolangma and choose the best answer to each of the questions.3. What is Nepal’s solution to the environmental problem?[音频]

A. Limiting the number of climbers each day.
B. Limiting the waste each climber can produce.
C. Asking climbers to pay a deposit before they go up.
D. Asking the climbers not to produce any waste while climbing.

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将四个不同颜色的乒乓球随机放入编号分别为1，2，3，4的四个盒子中（每个盒子足够大）．（1）求编号为1的盒子为空盒的概率；(用“/”表示)（2）求空盒的个数ξ的分布列和数学期望E（ξ）．(用“/”表示)

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已知X服从B（10，0.1），计算E（2X+1）=

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Listen to a talk about an environmental problem on Mount Qomolangma and choose the best answer to each of the questions.1. According to the talk, how can you find the way to the Base Camp on Mount Qomolangma?[音频]

A. By following other climbers. By following the tents selling food. C. By following the rubbish left behind. D. By following the tents selling equipment.

Listen to a talk about an environmental problem on Mount Qomolangma and choose the best answer to each of the questions.2. Why did China close its base on Mount Qomolangma?[音频]

Listen to a talk about an environmental problem on Mount Qomolangma and choose the best answer to each of the questions.3. What is Nepal’s solution to the environmental problem?[音频]

将四个不同颜色的乒乓球随机放入编号分别为1，2，3，4的四个盒子中（每个盒子足够大）．（1）求编号为1的盒子为空盒的概率；(用“/”表示)（2）求空盒的个数ξ的分布列和数学期望E（ξ）．(用“/”表示)

已知X服从B（10，0.1），计算E（2X+1）=

A. By following other climbers.
By following the tents selling food.
C. By following the rubbish left behind.
D. By following the tents selling equipment.