单项选择题
A.1510W B.1103 C.1508 D.1402
A.80kPa B.10kPa C.1000kPa D.100kPa
A.2.5L/min B.1L/min C.10L/min D.0.5L/min
A.12cm B.15cm C.13cm D.16cm
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