鼠笼式异步电动机定子三相绕组的V1、V2两线是第（）相绕组的两端（旧标号是D2、D5）。
A、1
B、2
C、3
D、4
参考答案：B
What worried the child most was _____________ to visit his mother in the hospital.
A．to his being allowed
B．his not being allowed
C．not his being allowed
D．not his allowed
“一国两制”的构想，首先实践于__________问题的解决。 [ ]
A．台湾
B．澳门
C．香港
D．九龙
