数字保护接口通过光纤PCM/SDH设备数字网络传输时的传输时间()。
A.<5ms
B.<10ms
C.<15ms
参考答案:A
小儿切脉的年龄为()
A.1岁以后
B.2岁以后
C.3岁以后
D.5岁以后
E.6个月以后
I'll be home late, but please don't stay ____ for me.
A.up
B.in
C.over
D.on