在一个无盖的长方体铁桶内外涂漆,涂漆的是5个面。[ ]
错误
Clare has offered a _______ of $ 100 to anyone who can find her lost cell phone.
A.benefit
B.cost
C.reward
D.price
可能替代氯气的消毒剂是()
A.臭氧
B.高锰酸饵
C.漂白粉
D.二氧化氯