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【单选题】
电场强度和磁感应强度的单位分别为A.
V/m 、 A/m
B.
V/m 、 T
C.
、 A/m
D.
、T
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【简答题】已知α为第三象限角且 sinα=- 3 5 ， （1）求cosα，tanα； （2）求 sin(α- π 2 )+tan(7π-α) 的值．
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【简答题】(三) What would you think if you saw a fish walking? Would you look again i__1_ you saw a fish climbing a tree? There is a fish that does both of these things. It is c __ 2 _ the tree-climbing fish. It...
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