题目内容

可以作消毒剂的表面活性剂是

A.苄泽
B.卖泽
C.泊洛沙姆
D.十二烷基硫酸钠
E.苯扎氯铵

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Listen to the following sentences and fill in the blanks with right words. Can you ____ the _____?

A piece of_____, please.

Peter's in the _____.

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