401-411线间的()联锁,用于对主电路接地继电器ZJDJ的信号显示装置的复位。
A、WHZJ常开
B、FSJ的常开
C、QDK联锁
D、FZJ常开
参考答案:D
已知奇函数f(x)是定义在(-3,3)上的减函数,且满足不等式f(x-3)+f(x2-3)<0,则不等式解集______.
93. If you can speak very ______ English, you will have more chances to find a job than others.
A.correct
B.pure
C.proper
D.Exact