位于额下回后部的是（）。
A.视区
B.听区
C.书写语言中枢
D.听觉语言中枢
E.运动语言中枢
参考答案：E
在设计时选用组合开关用于7kW以下电动机起动、停止时其额定电源应等于______倍的电动机额定电流。
John Preston was tired（）living in east London, in which he had moved after his wife's death.
A.to
B.of
C.at
D.for
