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【简答题】
Jane spent 4 hours buying New Year gifts. It__________Jane 4 hours to buy New Year gifts.
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举一反三
【单选题】Fuel oil tanks must be fitted with （） that can be closed rapidly and remotely in the event of an emergency such as a fire.
A.
stop valves
B.
non-return valves
C.
quick closing valves
D.
relief valves
【单选题】Fuel oil tanks must be fitted with ____ that can be closed rapidly and remotely in the event of an emergency such as a fire
A.
stop valves
B.
non-return valves
C.
quick closing valves
D.
relief valve
【单选题】What is the earliest workon food therapy in China?
A.
The Yellow Emperor's Classic of Internal Medicine
B.
Compendium of Materia Medica
C.
Treatise on Fevers
D.
Shennong Tastes a Hundred Grasses
【单选题】当发动机转速一定,负荷增加时( )
A.
汽油机充气效率增加,柴油机充气效率基本不变
B.
汽油机充气效率减小,柴油机充气效率增加
C.
汽油机充气效率减小,柴油机充气效率减小
D.
汽油机充气效率增加,柴油机充气效率减小
【单选题】当发动机转速一定，负荷增加时（）。
A.
汽油机充气效率增加，柴油机充气效率基本不变
B.
汽油机充气效率减小，柴油机充气效率增加
C.
汽油机充气效率减小，柴油机充气效率基本不变
D.
汽油机充气效率增加，柴油机充气效率减小
【单选题】What is the earliest known written record of Chinese medicine?
A.
The Classic of Difficult Issues.
B.
Shennong’s Herbal Classic.
C.
The Yellow Emperor’s Inner Classic.
D.
Treatise on Febrile and Miscellaneous Diseases.
【单选题】What is the earliest recorded use of windmills?
A.
Generating electricity
B.
Pumping water
C.
Grinding grains
D.
Propelling boats
【单选题】当发动机转速一定,负荷增加时( )
A.
汽油机的残余废气系数增加,柴油机的残余废气系数增加
B.
汽油机的残余废气系数增加,柴油机的残余系数减小
C.
汽油机的残余废气系数减小,柴油机的残余废气系数基本不变
D.
汽油机的残余废气系数减小,柴油机的残余废气系数增加
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