单项选择题
A.＞30s B.＞35s C.＞40s D.＞45s E.＞60s
A.90g／L B.95g／L C.100g／L D.105g／L E.110g／L
A.25%～35% B.25%～30% C.30%～35% D.35%～40% E.30%～40%
A.70g／L B.80g／L C.85g／L D.90g／L E.95g／L
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