使用油隔离泵时,运行中应重点监视(),以保证设备的正常运行。
A.油隔离罐的油位;
B.电动机的电流;
C.油隔离泵的出口压力;
D.泵的入口压力。
参考答案:A
It is said that potato chips ____________ by mistake about a hundred years ago.
A.invent
B.invented
C.are invented
D.were invented
99Tcm-MIBI脑显像主要为()
A.显示脑脊液间隙
B.显示脑肿瘤
C.显示脑内炎症
D.显示脑梗死
E.显示脑脊液动为学改变