【单选题】
A <{p}><{font _mstmutation="1" _msthash="20512" _msttexthash="174191030"}>单位变动成本越高，总成本线斜率越大，保本点越高<{/font}><{br/}><{/p}>
B <{p}><{font _mstmutation="1" _msthash="20513" _msttexthash="90211329"}>综合贡献边际率越高，保本点越低<{/font}><{br/}><{/p}>
C <{p}><{font _mstmutation="1" _msthash="20514" _msttexthash="74668451"}>固定成本总额越小，保本点越低<{/font}><{br/}><{/p}>
D <{p}><{font _mstmutation="1" _msthash="20515" _msttexthash="130104442"}>单价越高，总收入线斜率越大，保本点越高<{/font}><{br/}><{/p}>
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