月平均电量（）kW·h及以上的电力用户电能计量应采用0．5级的有功电能表。
A.0.5×106
B.1×106
C.2×106
D.5×106
参考答案：B
There's a saying: " Life is 10% ____happens to us and 90% ______we respond to it. [ ]
A. who; why
B. what; how
C. which; when
D. that; that
个体身心发展的动因理论都有哪些？
