一级到三级医院员工比例是:高:中:低=()。
参考答案:3:4:8
选择合适的单词填空。
for in us on go
1. Let lean the room.
2. It's time school.
3. What is _____ your bag?
4. Let's to school.
5. The TV room is the first floor.
SOLAS公约规定,船舶失火时,谁应负责指挥消防队员进现场灭火()。
A.大副
B.二副
C.三副
D.水手长