皮皮学,免费搜题
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【单选题】
水貂病毒性肠炎的一个重要特征是( )
A.
消瘦
B.
发热
C.
精神委顿
D.
食欲不振
E.
白细胞减少
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【单选题】An organization’s ability to respond to changes in demand with respect to volume and variety refers to ____.
A.
responsiveness
B.
leanness
C.
agility
D.
relevancy
【单选题】正弦交流电路中某元件两端的电压为 u=200sin(314t-30°)V,电流为i=10sin(314t-120°)A,则该元件是( )元件。
A.
电阻
B.
电感
C.
电容
D.
阻容性
【简答题】A.Call the housing office. B.Repair holes in room walls. C.Remove personal property. D.Register for summer school.
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【简答题】leanness ________
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【多选题】正弦交流电路中某元件两端的电压为 V,电流 A,则该元件是( )元件。
A.
电容
B.
电感
C.
频率为50HZ
D.
U=200V
【单选题】已知交流电路中某元件的电压 u 和电流 i 分别为 V , A ,则该元件为 。
A.
纯电阻
B.
纯电感
C.
纯电容
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