【单选题】
A <{p}><{font _mstmutation="1" _msthash="20489" _msttexthash="9066265"}>质底法<{/font}><{br/}><{/p}>
B <{p}><{font _mstmutation="1" _msthash="20490" _msttexthash="8586396"}>点数法<{/font}><{br/}><{/p}>
C <{p}><{font _mstmutation="1" _msthash="20491" _msttexthash="8626826"}>范围法<{/font}><{br/}><{/p}>
D <{p}><{font _mstmutation="1" _msthash="20492" _msttexthash="9503780"}>等级法<{/font}><{br/}><{/p}>
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