简述对电梯保洁的规定。
参考答案:
保持电梯机房、井道、轿厢的清洁及空气流通。定人定时对轨道、门导轨进行清洁,加油润滑等。
With the development of science and technology,there is no doubt________Chinese astronauts will land
on the moon in the near future.[ ]
A. whether
B. that
C. what
D. which
老年养护机构包括()
A.老年公寓
B.养老院
C.日间护理院
D.临时托老所
E.临终关怀医院