解薛定谔方程引入量子数不包括（）
A、主量子数n
B、角量子数l
C、磁量子数m
D、自旋量子数ms
参考答案：D
The school rules state that no child shall be allowed out of the school during the day, ______ accompanied by an adult.
A．once
B．when
C．if
D．unless
