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【单选题】
恒定磁场中不同磁媒质分界上的边界条件为( ) A.H ln =H 2n B.H lt =H 2t C.B ln =B 2n D.B lt =B 2tA.
B.
C.
D.
D
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【简答题】His recommendation that she (send)______ to study abroad was rejected.
【单选题】She will send you an e-mail as soon as she in Canada.
A.
arrives
B.
arrived
C.
am arriving
D.
will arrive
【单选题】She wondered how she could send a signal. She wanted to send ____.
A.
a letter
B.
a sign
C.
a signature
D.
a message
【简答题】___________ (send) her two kids to school，she began to do some housework.