机泵润滑油高位油罐可在事故状态下，（）向机泵轴承供油。
A、较长时间
B、较短时间
C、限定时间内
D、持续
参考答案：C
Although our former neighbor here for years, we seldom met with each other．
A．lived
B．has lived
C．was living
D．had lived ．
