设在辅助所的闭塞设备与有关站闭塞设备应（）。
A.闭塞
B.元闭塞
C.联锁
D.无联锁
参考答案：C
The Chinese government has made the Mid-autumn festival a national holiday,_____ people will have a day off.
A．when
B．which
C．where
D．what
证伪是一个科学理论是一件非常复杂的事情么？
