救治期间禁用中枢兴奋剂的是（） A.醛类镇静催眠药中毒 B.氨基甲酸酯类中毒 C.二

荧光显微镜滤板的作用在于_________、_______________、_________________。

A kind of little cars may some day take the place of today’s ones. If everyone drives such cars in the future, there will be less pollution in the air. There will also be more space for parking cars in cities, and the streets will be less crowded. Three such cars can fit in the space now needed for one car of the usual size.

The little cars will cost much less to own and to drive. Driving will be safer, too, as these little cars can go only 65 kilometers an hour.

The cars of the future will be fine for getting around the city, but they will not be useful for long trips. Little cars will go 450 kilometers before needing to stop for more gasoline.

If big cars are still used along with the small ones, two sets of roads will be needed in the future. Some roads will be used for the gig, fast cars and other roads will be needed for the slower small ones.

小题1:There is much pollution in the air today because ___________.

A．people drive big cars

B．people drive little cars

C．the cars go 65 kilometers an hour

D．the cars can go 450 kilometers an hour小题2:The usual size of cars today is _______ that of the future cars.

A．much smaller than

B．much the same as

C．three times as large as

D．a little larger than小题3: Which of the following is NOT true?

A．Big cars cost more to own and to drive

B．Big cars are not useful for long trips

C．The cars of the future will be smaller than today’s cars.

D．Small cars are slower than big cars.小题4:The street will be less crowded because ______________.

A there will be fewer cars in the future

B. driving future cars will be safer

C. there will be fewer passengers in the street

D. future cars will be much smaller

小题5: Two sets of roads may be needed in the future because_________.

A．there will be too many cars in the future

B．more and more people will get around a city

C．bit cars and little cars may be used along with each other

D．it looks more beautiful to have two sets of roads

钻进过程中水龙头的冲管由中心管带动旋转。

一般来说自汗盗汗证有（）之分。

配送中心配送方式的缺点是（）

A.能力弱

B.配送品种单一

C.数量少

D.灵活机动性较差