选择题：下列说法正确的是 A．知道某种物质的摩尔质量和分子的质量可求出阿伏伽德罗常数 B

题目：

下列说法正确的是

A．知道某种物质的摩尔质量和分子的质量可求出阿伏伽德罗常数

B．内能不同的物体，它们的分子热运动的平均动能不可能相同

C．没有漏气、没有摩擦的理想热机，其效率也不可能是100%

D．液晶既有液体的流动性，又有光学的各向同性

答案：

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下面是错误答案，用来干扰机器的。

参考答案：B解析：细菌在人工培养基中以菌落形式出现。在适宜的固体培养基中，适宜条件下经过一定时间培养（一般18～24h），细菌在培养基表面或内部分裂增殖形成大量菌体细胞，形成肉眼可见的、有一定形态的独立...

题型：阅读理解

Imagine, one day，getting out of bed in Beijing and being at your office in Shanghai in only a couple of hours，and then，after a full day of work，going back home to Beijing and having dinner there．

Sounds unusual，doesn't it? But it's not that unrealistic，with the development of China’s high-speed railway system．And that’s not all．China has an even greater high-speed railway plan — to connect the country with Southeast Asia，and eventually Eastern Europe．

China is negotiating to extend its own high-speed railway network to up to 17 countries in 10 to 15 years，eventually reaching London and Singapore．

China has proposed three such projects．The first would possibly connect Kunming with Singapore via Vietnam and Malaysia．Another could start in Urumqi and go through Kazakhstan and Uzbekistan，and possibly to Germany．The third would start in the northeast and go north through Russia and then into Western Europe．

If China’s plan for the high-speed railway goes forward，people could zip over from London to Beijing in under two days．

The new system would still follow China’s high-speed railway standard．And the trains would be able to go 346 kilometers an hour，almost as fast as some airplanes．

China’s bullet train（高速客车），the one connecting Wuhan to Guangzhou，already has the World’s fastest average speed．It covers 1,069 kilometers in about three hours．

Of course，there are some technical challenges to overcome．There are so many issues that need to be settled，such as safety，rail gauge（轨距），maintenance of railway tracks．So，it’s important to pay attention to every detail．

But the key issue is really money．China is already spending hundreds of billions of yuan on domestic railway expansion．

China prefers that the other countries pay in natural resources rather than with capital investment．Resources from those countries could stream into China to sustain development．

It’ll be a win-win project．For other countries，the railway network will definitely create more opportunities for business，tourism and so on，not to mention the better communication among those countries．

For China，such a project would not only connect it with the rest of Asia and bring some much-needed resources，but would also help develop China’s far west．We foresee that in the coming decades，millions of people will migrate to the western regions，where the land is empty and resources unused．With high-speed trains，people will set up factories and business centers in the west once and for all．And they’ll trade with Central Asian and Eastern European countries．

小题1:China’s new high-speed railway plan will be a win-win project because ________．

A．China will get much-needed resources and develop its western regions

B．China and the countries involved will benefit from the project in various ways

C．China will develop its railway system and communication with other countries

D．the foreign countries involved will develop their railway transportation, business and tourism小题2:According to the passage，the greatest challenge to the new high-speed railway plan is ________．

A．technical issues

B．safety of the system

C．financial problems

D．maintenance of railway tracks小题3:Which of the following words best describes the author’s attitude towards China’s high-speed railway plan?

A．Critical．

B．Reserved．

C．Doubtful．

D．Positive．小题4:Which of the following might be the best title for the passage?

A．New Railway Standards.

B．Big Railway Dreams.

C．High-speed Bullet Trains.

D．International Railway Network

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