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【单选题】
What have you been doing ____? I’ve seen so little of you. I have to leave early for work and come home very ______.A.
late;lately
B.
late;late
C.
lately;late
D.
Lately;lately
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【简答题】A．It is a race for gold and silver. B．It is a race for computer technology. C．It is a contest of strength and speed. D．It is a contest of mind, athletic determination and foreign languages.
【判断题】一个单位长度上密绕有n匝线圈的长直螺线管，每匝线圈中通有强度为I的电流，管内充满相对磁导率为ur的磁介质，则管内中部附近磁感应强度为μrμ0nI，磁场强度为nI．
A.
正确
B.
错误
【简答题】一个单位长度上密绕有 n 匝线圈的长直螺线管,每匝线圈中通有强度为 I 的电流,管内充满相对磁导率为 m r 的磁介质,则管内中部附近磁感强度 B =__________________ ,磁场强度 H =__________________ .
【简答题】一个单位长度上密绕有n匝线圈的长直螺线管,每匝线圈中通有强度为I的电流,管内充满相对磁导率为mr的磁介质,则管内中部附近磁感强度B =,磁场强度H =.
【单选题】Apple co is an UK co and banana co is a co based in US. Apple co is going to pay Banana 4.8m dollars in 4 months. Apple co is now considering use currency option to hedge potential risk. The spot rate...
A.
3039151
B.
3041975
C.
3029175
D.
3042351
【单选题】A co is a co based in UK and B is an American co. The A co has to pay 5m dollars to B in 3 months. A co decided to use money market to hedge potential risk. The annual interest rates available to A an...
A.
3.14
B.
3
C.
3.27
D.
3.3
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