如果投资方案的内部收益率（）其资本成本，该方案为不可行方案。
A．大于
B．等于
C．小于
D．不小于
参考答案：C
幂函数y=xm在x∈（-∞，0）上单调递减，则m可以是（ ）
A．3
B．1
C．-2
D．-3
A. Evidence shows that wild animals can transmit virus to man. B. Scientists report the extinction of some endangered wild animals C. Men and women cannot protect themselves from the attack of virus. D. Hunting or eating animals will not bring the risk of being infected by virus.
