小鼠生物学特性

The Middle East countries and other world powers have been facing major political tensions which have made the stability of the crude oil prices very unpredictable. Each day the prospect（前景）of oil prices has become more and more unclear.

Water fuel has been developed as an alternative source of fuel which has fast become popular around the world . This exciting technology has various advantages . More than 70 percent of the Earth is covered with water and this fuel source does not produce any harmful pollutants or dangerous emissions（散发物）either . They in fact also double the mileage（里程）of the cars that are powered by them .

Water fuel technology has been known to be the best additional form of fuel source for petrol or other fuel sources . However , any claim that this technology can be only an additional source and not a replacement is totally incorrect and misleading .such ideas have been implied by those who look down on this technology , On the contrary , this technology has numerous benefits such as it does not produce any harmful emissions which can affect the climate changes . It further helps to reduce the level of noise produced by the engines.

Various researches reflect that running costs on fuels for automobiles can be easily saved up to 40 percent with the help of water cell technology .This technology can easily work on various cars powered by gas . It can also be used for trucks , vans and other vehicles . The tap water can also be easily used directly and you do not need any special water that is specially treated to be used for this purpose . You can easily find a lot of details so that you can adapt your car to use the technology .

64. We can learn from the first paragraph that the price of oil______________,

A . has been rising for a long time   B is going down at present

C is unstable for political reasons   D is decided by powerful countries

65. Water fuel technology has many advantages EXCEPT that______________

A water fuel will not pollute the environment

B it is very simple to get such kind of fuel

C cars powered by the fuel can be used longer

D it has already been popular around the world

66. People holding the opposite idea think that______________.

A the world climate won’t be influenced by fuel

B petrol can’t be completely replaced by water fuel

C the engines will give out less noise than before

D water fuel can’t act as an additional source for gas

67.What is the best title for the text?

A. Water Fuel-Becoming a Reality Now        B. Water Fuel-Lower Cost

C. Water Fuel-a Long Way to Go             D. Water Fuel-a Safer Choice

大额支付交易，是指规定（）以上的人民币支付交易。

A.用途

B.金额

C.频率

D.流向

2013年9月2日3时16分，我国在酒泉卫星发射中心用（）运载火箭，成功将遥感卫星十七号发射升空，卫星顺利进入预定轨道。

在连编对话框中，下列不能生成的文件类型是

A．．DLL

B．．APP

C．．PRG

D．．EXE