阅读理解阅读下列短文，从每题所给的四个选项A、B、C、D中选出最佳选项.

　　Considered as a continuous body of fluid (流体), the atmosphere (大气) is another kind of ocean. Yet, in view of the total amount of rain and snow on land areas in the course of a year, one of the most amazing water facts is the very small amount of water in the atmosphere at any given time. The volume (体积) of the lower seven miles of the atmosphere, where weather events take place, is roughly four times the volume of the world's oceans. But the atmosphere contains very little water. It is chiefly in the form of vapor (蒸气), some of which is carried over land by air currents. If all vapor suddenly fell from the air onto the earth's surface, it would form a layer only about one inch thick. A heavy rainstorm on a given area may use up only a small percentage of the water from the air mass that passes over. How, then, can some land areas receive more than 400 inches of rain per year? How can several inches of rain fall during a single storm in a few minutes or hours? The answer is that rain- producing air masses are always moving, and as the driving air mass moves on, new damp air takes its place.

　　The basic source of most water vapor is the ocean. Evaporation (蒸发), vapor transport, and rainfall make up the continuous movement of water from ocean to atmosphere to land and hack to the sea．Rivers return water to the sea．In the underground, flowing bodies of water send out some water directly into rivers and some directly to the sea．

(1)What might have been discussed in the preceding (在前的)paragraphs?

[　　]

(2)It can be inferred from the passage that ________.

[　　]

A．the atmosphere has a lot of water in it when it goes around

B．the water in the atmosphere is purer than that in the world's oceans

C．the amount of water in the atmosphere is greater than that in the oceans in the world

D．the small amount of water in the atmosphere plays an important part in the rainfall on the earth

(3)Which fact does this passage lead us to believe?

[　　]

A．The volume of the atmosphere is four times that of the world's oceans.

B．The water in the oceans is the main source of rain and snow on land areas.

C．The atmosphere is mainly made up of the vapor carried over land by air currents.

D．The earth cannot support the water in the atmosphere if it falls down onto the earth suddenly．

阅读理解阅读下列短文，从每题所给的四个选项A、B、C、D中选出最佳选项.

　　Considered as a continuous body of fluid (流体), the atmosphere (大气) is another kind of ocean. Yet, in view of the total amount of rain and snow on land areas in the course of a year, one of the most amazing water facts is the very small amount of water in the atmosphere at any given time. The volume (体积) of the lower seven miles of the atmosphere, where weather events take place, is roughly four times the volume of the world's oceans. But the atmosphere contains very little water. It is chiefly in the form of vapor (蒸气), some of which is carried over land by air currents. If all vapor suddenly fell from the air onto the earth's surface, it would form a layer only about one inch thick. A heavy rainstorm on a given area may use up only a small percentage of the water from the air mass that passes over. How, then, can some land areas receive more than 400 inches of rain per year? How can several inches of rain fall during a single storm in a few minutes or hours? The answer is that rain- producing air masses are always moving, and as the driving air mass moves on, new damp air takes its place.

　　The basic source of most water vapor is the ocean. Evaporation (蒸发), vapor transport, and rainfall make up the continuous movement of water from ocean to atmosphere to land and hack to the sea．Rivers return water to the sea．In the underground, flowing bodies of water send out some water directly into rivers and some directly to the sea．

(1)What might have been discussed in the preceding (在前的)paragraphs?

[　　]

(2)It can be inferred from the passage that ________.

[　　]

A．the atmosphere has a lot of water in it when it goes around

B．the water in the atmosphere is purer than that in the world's oceans

C．the amount of water in the atmosphere is greater than that in the oceans in the world

D．the small amount of water in the atmosphere plays an important part in the rainfall on the earth

(3)Which fact does this passage lead us to believe?

[　　]

A．The volume of the atmosphere is four times that of the world's oceans.

B．The water in the oceans is the main source of rain and snow on land areas.

C．The atmosphere is mainly made up of the vapor carried over land by air currents.

D．The earth cannot support the water in the atmosphere if it falls down onto the earth suddenly．

假如你(李华)的网友John即将外出旅行，请你根据以下提示，用英语给他写封电子邮件，向他介绍你对旅游的看法并提醒他旅行注意事项。
1. 旅游是一种非常好的活动。当你累了或有空的时候，到外地走走。欣赏美景，呼吸
新鲜空气，交朋友，放松身心，有益健康。
2. 旅行前的准备。了解天气，带好衣服、相机、常用药品等。
3. 旅行时注意饮食卫生和安全，防止小偷。
要求：1、行文连贯，不得逐句翻译；
2、词数：120---150词左右

假如你(李华)的网友John即将外出旅行，请你根据以下提示，用英语给他写封电子邮件，向他介绍你对旅游的看法并提醒他旅行注意事项。

1. 旅游是一种非常好的活动。当你累了或有空的时候，到外地走走。欣赏美景，呼吸

新鲜空气，交朋友，放松身心，有益健康。

2. 旅行前的准备。了解天气，带好衣服、相机、常用药品等。

3. 旅行时注意饮食卫生和安全，防止小偷。

要求：1、行文连贯，不得逐句翻译；

2、词数：100词左右

Dear John,

I’m glad to hear that you are going to travel. Now I’d like to share my view on travelling with you. ___________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________