肺动脉栓塞更易发生于（） A.右侧和下肺叶 B.左侧和下肺叶 C.右侧和上肺叶 D.

Ladies and gentlemen, I returned to this year in a time machine. In the year 2500, we are able to travel through time to any year in the history of the earth. This year is your last chance your lifestyle to save the earth.

Beginning in the middle of the 20^th century, a few people were worried about polluting the earth’s water and air, but most people did not change their way of life. Instead, they continued to pour(倒) dangerous chemical(化学物品) and other waste into lakes and seas, to drive more and more cars and trucks, and to cut down trees.

By the year 2200, the earth’s water was completely polluted. People could no longer drink water, and they had to use other types of liquids(液体). Scientists said that in the future there might be too many people on the earth. But not enough was done.

So by the year 2300, there were so many people that food became scarce. There was no water to grow food and all of the fish in lakes and seas died because of pollution. Terrible wars broke out between the rich and the poor. Scientists were working very hard to find another planet in space where humans could live.

By the year 2400, the air was too polluted for humans to breathe. So we had to leave the earth. But only the rich were able to leave. Where did we go? Nowhere. And everywhere. You see scientists did not find another safe planet, so now we must travel around the universe in our space ships. We are still looking for a place to call our home.

So it is up to you to change history. There is still hope. You must change your lifestyle now, before it is too late.

小题1:Which problem is NOT talked about in Paragraph 2?

A．Water

B．Air

C．Lifestyle

D．Food小题2: The underlined word ‘scarce’ means ‘______’ in Chinese.

A．昂贵的

B．充足的

C．缺乏的

D．特殊的小题3:Which of the following is NOT true?

A．Only a few people changed their lifestyle in the 20^th century.

B．There was no clean water for people to drink by the year 2200.

C．All the fish died because of the pollution by the year 2300.

D．We found a new home in another planet by the year 2400.小题4:What’s the best title of the passage?

A．Stop polluting

B．Change or leave

C．Look for new home

D．Return to the earth

图示结构El=const。在给定荷载作用下口BA为（）。

A.P/2

B.P/4

C.-P/4

D.0

VV230/180－2型空气压缩机的两个空气冷却器均为翅片管式冷却器并重叠在一起，采用（）冷却。

A.自然通风

B.强迫通风

C.水

D.冰

管理者实施控制的过程主要包括以下各阶段（）。

A.明确方法

B.制定标准

C.衡量绩效

D.纠正偏差

节能技术改造财政奖励资金管理暂行办法规定东部地区和中西部地区节能技术改造项目根据节能量分别按多少元／吨标准煤奖励？