单项选择题
A.＜30℃B.≤35℃C.≤30℃D.＜35℃
A.5〜6%B.5〜7%C.6〜7%D.5〜8%
A.40〜45minB.40〜50minC.45〜50minD.40〜48min
A.70〜76°CB.72〜76°CC.70〜75°CD.72〜78°C
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