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【单选题】

The air surrounding us is important to everyone. Without air, we could not exist. Everyone understands that. But air is necessary in many other ways — ways that are not always so obvious or widely known.
If we did not have air, there would be no sound. Sound travels through air. Where there is no air, there is no sound. Without air there would be no fire. There would be no automobiles, since motors need air in order to operate.
Without air, there would be no wind or clouds. The night time would be very cold and the days very hot. We would be forced to seek shelter from the sun, as there would be no atmosphere to protect us from the sun’s deadly rays.
In this huge ocean of air surrounding the earth, there is more energy than in all the coal, oil and gas we have on the earth. Electrical energy is collected in the atmosphere as water is collected and stored in a dam (大坝). The existence of electricity in the air has been known for centuries. Men have gazed in wonder at the bright patterns of lightening in storm clouds. But thorough (彻底的,深入的) study of electricity in the air was not possible until the development of radio.
Without air protection, the sun’s rays ______.

A.
will become very cold
B.
will do good to human beings
C.
will become hot
D.
will do harm to human beings
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参考答案:
举一反三

【单选题】It __________ eight years to build the Dam(大坝) from 1998 t0 2006.A.spends B.costs C

A.
4.It __________ eight years to build the Dam(大坝) from 1998 t0 2006. A.spends
B.
costs
C.
paid
D.
took

【单选题】Text 5 The air surrounding us is important to everyone. Without air, we could not exist. Everyone understands that. But air is necessary in many other ways — ways that are not always so ...

A.
We all know that we can’t exist without air.
B.
Without air, we can’t hear anything.
C.
Men have studied electricity in the air for centuries.
D.
There’s huge energy in the air surrounding the earth.

【单选题】三峡大坝是以下哪种坝型

A.
混凝土重力坝
B.
重力拱坝
C.
空腹拱坝
D.
面板堆石坝

【多选题】大坝定检报告的附件包括()

A.
重要函件公文
B.
收集的现场资料与试验数据
C.
专题论证
D.
咨询报告
相关题目:
【单选题】It __________ eight years to build the Dam(大坝) from 1998 t0 2006.A.spends B.costs C
A.
4.It __________ eight years to build the Dam(大坝) from 1998 t0 2006. A.spends
B.
costs
C.
paid
D.
took
【单选题】Text 5 The air surrounding us is important to everyone. Without air, we could not exist. Everyone understands that. But air is necessary in many other ways — ways that are not always so ...
A.
We all know that we can’t exist without air.
B.
Without air, we can’t hear anything.
C.
Men have studied electricity in the air for centuries.
D.
There’s huge energy in the air surrounding the earth.
【单选题】三峡大坝是以下哪种坝型
A.
混凝土重力坝
B.
重力拱坝
C.
空腹拱坝
D.
面板堆石坝
【多选题】大坝定检报告的附件包括()
A.
重要函件公文
B.
收集的现场资料与试验数据
C.
专题论证
D.
咨询报告
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