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【简答题】
图所示电路为正弦交流电路的一部分,已知电阻电流为i R =3 L sin314tA、电感电流为i L =4 sin(314t+90°)A、电容电流为i C =8 sin(314t-90°)A,求总电流i。
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【简答题】A.regularly B.occasionally C.rarely D.normally
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【单选题】How are paired NBDP frequencies normally used? .
A.
These are normally used for FEC conunurucations with coast radio stations.
B.
These are normally used for ARQ communications with coast radio stations.
C.
These are normally used only for distress communications to limit channel interference.
D.
These are normally used for DSC communications with coast radio stations.
【单选题】The separator may be working( commonly /normally)
A.
commonly
B.
normally
【简答题】阅读理解。 Proverbs are quite common in spoken English. We don't normally put them in a composition or a letter. Sometimes it is helpful if you know what common proverbs mean. Here are a few examples. 1) '...
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【单选题】按时出席宴请是礼貌的体现。一般可按规定时间提前或延后( )分钟到达
A.
2
B.
5
C.
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D.
10
【多选题】园艺产品的品质包括( )
A.
感官品质
B.
营养品质
C.
抗性品质
D.
贮运品质
【简答题】A.regularly B.usually C.commonly D.normally
【简答题】The marine bill of lading normally issued by( ).
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