磁极间相互作用的规律是同名磁极______,异名磁极______.
磁极间相互作用是:同名磁极相互排斥,异名磁极相互吸引;
故答案为:互相排斥,互相吸引.
—How are you going to the supermarket?
—We are going there bike.
A.on
B.at
C.in
D.by
具有镇静安神、平肝潜阳、收敛固涩功效的药物是()
A.石决明
B.夏枯草
C.龙骨
D.朱砂
E.菊花