Which of the following statements is true?
A.The divorce rate in Britain would reach 50 percent.
B.Some 34 percent of women have cohabited.
C.Over 50 percent of women cohabit before marriage.
D.13 percent of births were outside formal marriage in Britain.
第7题
除去注射剂原液中鞣质的方法不包括
A.改良明胶沉淀法
B.醇溶液调pH值法
C.聚酰胺除鞣质法
D.铅盐沉淀法
E.多效蒸馏法
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