电动机两端滚动轴承应使用（）润滑脂
A、ZGN—2
B、ZN—2
C、ZG—2
D、ZL—2
参考答案：D
The doctor ordered him to _____ to _____. [ ]
A. be on a diet; lose his weight
B. go on a diet; lose weight
C. be on a diet; lose weight
D. go on a diet; lose his weight
