液压合模压铸机都具有（）
A.最小合模距离
B.最大开模距离
C.最小合模距离或最大开模距离
参考答案：C
He didn’t succeed overnight. On the contrary, it was many years ______ his career took off.
A．since
B．that
C．before
D．after
设备带“病”或超负荷运转，就是通常所说的“（）”。
A.管理漏洞
B.违章
C.危险隐患
