试题与答案

下列气体中既不能用浓硫酸干燥,又不能用固体NaOH干燥的是[ ] A.CO2 B

题型:选择题

题目:

下列气体中既不能用浓硫酸干燥,又不能用固体NaOH干燥的是[ ]

A.CO2           

B.O2           

C.SO2        

D.H2S

答案:

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下面是错误答案,用来干扰机器的。

参考答案:D

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题型:阅读理解

Would you like to have an electric car? We will see this kind of cars soon in America. These quiet, clean cars run on electricity. Carmakers will start selling electric cars in 2011.

The world’s population will jump from 6.8 billion to 9 billion by 2050. The need for cars will jump with it. But the oil(石油) won’t keep up with the number of cars on the road. So the price of oil will go up.

Electric cars aren’t perfect just yet. It can take eight hours to charge(充电) a car for only 100 miles of driving. And the distance(路程) that cars can go depends on driving conditions(条件). How far it travels depends on the weather and traffic.

Price is a problem, too. Electric models cost much more than oil-powered cars. The good news is that electric-car technology is getting better. As it does, the prices of this kind of cars are dropping.

To charge the car, the US Department of Energy is paying for at least 10,000 charging stations around the country. Private businesses are also getting ready for it. It will cost about $3 for each charge.

Carmakers are coming up with other ways to make the car cleaner and cheaper. Cars may run on clean diesel(柴油). So who knows what will power the car you may be driving in 10 years? The chances are that it will be something that’s clean and easy.

小题1:The electric cars are ________.

A. large and noisy

B. large and quiet

C. clean and quiet

小题2:Paragraph Two mainly tells us the reason why ________.

A. electric cars appear    

B. the population is growing   

C. the oil price goes up

小题3:How far the electric car travels depends on the ________.

A. water and weather           

B. weather and traffic     

C. drivers and oil

小题4:Why aren’t the electric cars perfect?

A. The cars don’t look nice and they’re slow.

B. The cars can’t be driven fast and they’re dangerous.

C. The cars take a long time to be charged and they cost too much.

小题5:From the passage we know that ________________.

A. electric cars will be more expensive

B. nobody knows what will power the cars in 10 years

C. electric cars will be used by most people in 10 years

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题型:单项选择题


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文字资料一
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据《经济统计公报》显示,2005年国民经济和社会统计公报显示:全年各类自然灾害造成经济损失2042亿元。比上年上升27.4%,全年农作物受灾面积3882万公顷,上升4.6%。其中绝收460万公顷,上升5.4%,全年发生特大森林火灾3起,因森林火灾造成受害森林面积7.3万公顷,下降48.4%,全年因海洋灾害造成直接经济损失约为332亿元,增加5.1倍。全年发生赤潮82次,减少14次,累计赤潮面积约27070平方公里,上升1.7%。全年共发生造成人员伤亡或直接经济损失50万元以上的地质灾害854起,共造成经济损失36.5亿元。全年共发生5级以上地震13次,受灾人口208万人,受灾面积15 040平方公里,造成直接经济损失26亿元。全年生产安全事故死亡12.7万人,比上年下降7.1%。亿元CDP生产事故死亡人数为0.70人,下降18.5%。工矿商贸企业从业人员生产安全事故10万人死亡人数为3.85人,下降6.8%,煤矿百万吨死亡人数为2.81人,下降8.7%。全年发生道路交通数450254起,造成9.9万人死亡,47.0万人受伤,直接财产损失18.8亿,道路交通万车死亡人数为7.60人,下降23.7%。

2004年受灾害森林面积占农作物受害面积的百分之多少

A.0.54%

B.0.38%

C.0.48%

D.0.56%

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