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【判断题】
提高功率因数的方法有提高用电设备本身的功率因数和在感抗负载上并联电容器提高功率因数。()A.
正确
B.
错误
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皮皮学刷刷变学霸
举一反三
【单选题】The invitation for bids is publicized through proper media (newspaper, magazine, etc) to inform all prospective bidders is called _____.
A.
open bids
B.
selected bids
C.
limited competitive bids
D.
submission of bids
【简答题】“诺贝尔奖”的日语假名是( )
【简答题】食品分析过程成功与否的决定因素有哪些?
【单选题】Certain drugs can intercalate between DNA bases and alter the backbone of the DNA. The backbone of a DNA strand is composed of which of thefollowing? Choose the one best answer.
A.
Phosphates and sugars
B.
Bases and phosphates
C.
Nucleotides and sugars
D.
Phosphates and nucleosides
E.
Sugars and bases
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