题目内容
（请给出正确答案）
[主观题]
As a result of their experiments, Dr. Corsi\'s team found that_________ A．dishwashe
As a result of their experiments, Dr. Corsi\'s team found that_________
A．dishwashers are very efficient machines
B．indoor pollution rivals outdoor pollution
C．tap water is as polluted as bottled water
D．gas masks are a useful protective device
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