The young driver looked over the engine carefully lest it ______ on the way.
A. goes wrong
B. would go wrong
C. went wrong
D. should go wrong
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The figure of illiteracy in Britain comprises （）
A. zero point one percent of that of illiteracy in the world
B. zero point two percent of the world's adult population
C. thirty-five percent of Europe's population
D. three point five percent of that of the illiteracy in Southern Europe
Areas where students have particular difficulty have been treated ______ particular care.
A. by
B. in
C. under
D. with
柴油发电机组台数的确定，当容量不超过( )时，宜选用单机，当容量在( )以上时，宜选择两台机组，两台机组各种物理参数最好相同，便于运行时并车。
A. 700kW，700kW
B. 800kW，800kW
C. 900kW，900kW
D. 1000kW，1000kW
有静态开关的不间断电源系统有( )类型。
A. 两种
B. 三种
C. 四种
D. 五种
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