从所给的四个选项中,选择最合适的一个填入问号处,使之呈现一定的规律性()
A.
B.
C.
D.
参考答案:C
I’ve come from the government with a message ________ the meeting won’t be held tomorrow.
A.if
B.that
C.whether
D.which
初次来压前工作面处于()
A、增压区
B、减压区
C、稳压区