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[单选题]
正常成年人呼吸每分钟多少次
A.20-30
B.16-20
C.20-40
D.40-41
提问人:网友lixin080108
发布时间:2022-01-07
A.20-30
B.16-20
C.20-40
D.40-41
B.where did Mary work
C.where Mary works
D.where Mary worked
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