单项选择题
A.0.008 B.0.08 C.0.8 D.8
A.60% B.70% C.80% D.90%
A.0℃ B.10℃ C.20℃ D.30℃
A.1.05g/cm’ B.1.10g/cm’ C.1.26g/cm’ D.l40g/cm’
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