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【单选题】
正弦量的平均值与最大值之间的关系正确的是()A.
E=Em/1.44
B.
U=Um/1.44
C.
Iav=2/ *Im
D.
Eav=Im/1.44
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皮皮学刷刷变学霸
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【简答题】交通仿真所需的静态交通数据主要是( )及其( )数据。
【单选题】U. S. Life Expectancy Hits New High Life expectancy rates in the United States are at an all- time high, with people born in 2005 projected to live for nearly 78 years, a new federal study finds. The ...
A.
moved up and down.
B.
been declining.
C.
remained steady.
D.
been on the rise.
【简答题】With so many people to care about her, she feels very happy.
【单选题】Nancy Green lives _______, but she never feels _______. [ ]
A.
lonely; alone
B.
alone; alone
C.
lonely; lonely
D.
alone; lonely
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