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【单选题】
One noticeable flaw about the theory, Patriarchal Genes, is ______.A.
the assumption that women’s dependence on external help made them dependent on men, rather than on other women, and that male competitiveness made men socially dominant
B.
the deduction that women have tended to move out of the way and dedicate their lives to raising children
C.
the assertion that through millions of years of evolution, men amd women evolved different survival and reproduction strategies
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举一反三
【简答题】请扼要说明聚合酶链反应(the polymerase chain reaction，PCR)的基本原理。
【单选题】重量分析法的沉淀法对称量形式的要求不包括
A.
溶解度小
B.
具有确定的化学组成
C.
具有足够的化学稳定性
D.
具有确定的化学组成和足够的化学稳定性
E.
分子量尽可能大
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