Can you set the table?[ ]
A. I can.
B. Yes, I can.
C. No, I can.
答案:B
正确的实验操作是确保实验成功和安全的前提,下列实验操作中你认为符合规范的有______(填序号).
A.蒸发液体时,不断用玻璃棒搅拌
B.稀释浓硫酸时,将水倒进盛有浓硫酸的量筒并搅拌
C.使用pH试纸前,将其均匀湿润
D.做一氧化碳还原氧化铁实验时,先通一氧化碳,再点燃酒精灯.
— What is Jenny doing?
— She is ____________.[ ]
A. swims
B. swimming
C. swim