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【单选题】
关于日光灯发出的照明光,以下说法中正确的是A.
主要是由两个电极发的光
B.
主要是由两极间的气体导电时发的光
C.
主要是由两极间的气体导电时发出的紫外线光
D.
主要是由管壁上的荧光粉受紫外线作用时发的光
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【单选题】Generally, mechanical system refers to( )
A.
mechanical transmission system
B.
mechanical actuator
C.
machinery and working process
D.
mechanical components and tools
【简答题】Mechanical docks and watches had appeared by ______.
【简答题】机械安全(mechanical security)
【简答题】机械性消化(mechanical digestion)
【单选题】Generally, mechanical system refers to( )
A.
mechanical transmission system
B.
mechanical actuator
C.
machinery and working process
D.
mechanical components and tools
【简答题】机械性消化(mechanical digestion)
【简答题】The Hillary Clinton fashion effect evidences the huge 1 between how we judge men and women according 2 how they dress. If a female politician doesn't know how 3 dress like a lady, she's lampooned, sha...
【单选题】Why does the professor mention 'mechanical engineering'?
A.
To show that words in mechanical engineering are more specialized and more difficult.
B.
To show that words in some major fields are more difficult to learn than the words used daily.
C.
To show that different learning purposes result in different vocabulary learning strategies.
D.
To show that only people in mechanical engineering need to learn vocabulary in this field.
【简答题】If a politician has a throng of
admirers, there are ________ who like them. (1.0分)A. many people B. a few people
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