润滑脂加注时,应从挤压面的()。
A.挤压面的上部缝隙加注
B.挤压面的下部缝隙加注
C.挤压面的侧面缝隙加注
D.润滑脂的加油孔注入孔
参考答案:D
有关哺乳哪项是错误的:
A.母乳喂养
B.尽量早哺乳
C.定时哺乳
D.按需哺乳
E.注意哺乳前卫生
The lights on the outside of the canopy on an inflatable liferaft operate().
A.by turning the globe clockwise
B.by a switch at each light
C.by a light sensor
D.automatically when the raft is inflated