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【单选题】
唾液分泌的调节主要是（）A.
神经反射
B.
体液调节
C.
神经反射和体液调节
D.
自身调节
E.
体液调节和自身调节
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【单选题】已知某投资项目折现率为13%时，净现值为1100万元，折现率为14%时，净现值为-980万元。则该投资项目的内部收益率为( )。
A.
13.12%
B.
13.30%
C.
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D.
13.87%
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