单项选择题
A.80% B.30% C.40.70% D.50%
A.1Mpa B.4Mpa C.6Mpa D.10Mpa
A.110.325kpa B.101.325kpa C.720mmhg D.780mmhg
A.从手到手 B.从左手到脚 C.从右手到脚 D.从脚到脚
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