使用乙炔、氢气、油类、瓦斯等可燃物质的人员,必须熟悉这些材料的特性及()规则。
A、使用
B、计量
C、防火防爆
参考答案:C
用合适的介词或副词填空
11.Tell me ________ the concert.
2.If you like, I will send you ________ a different place to work.
3.Don’t use my computer ________ playing games.
4.Would you like to help the old woman ________ her housework?
5.If you tell a lie to me, I’ll be angry ________ you.
6.Lin Tao wants to play the game ________ my new computer.
7.My father said that I could use his computer only ________my homework.
8.You should say sorry to her, ________ all, you have hurt her.
9.Next time you should play football ________ Da Wei.
10.My dad was ________, so I decided to use his computer.
在电子商务中,物流服务 包括商流服务。