单项选择题X 纠错
A.20kPa B.25kPa C.30kPa D.40kPa
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单项选择题
A.20s B.25s C.30s D.40s
A.120~130kPa B.120~160kPa C.180~210kPa D.210~230kPa
A.12~15s B.10~15s C.8~12s D.4~8s
A.450kPa B.500kPa C.560kPa D.600kPa
A.120~130s B.130~150s C.150~180s D.210~230s
A.500~550kPa B.550~600kPa C.595~610kPa D.900~950kPa
A.500kPa B.600kPa C.700kPa D.900kPa
A.1位 B.2位 C.4位 D.5位
A.140kPa B.150kPa C.160kPa D.190kPa
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