法的失效时间
参考答案:
又称法律终止生效的时间,是指法律从何时起不再具有约束力。
It was difficult being in a foreign country, ________ if you don’t speak the language.
A.extremely
B.naturally
C.basically
D.especially
同步信号应包括,()信号,()信号和()信号三种