【单选题】如果两个寿命周期不同的互斥方案进行比选,各年净收益相同且大于零,则( )
【单选题】Linguists believe this account justifies Chinese characters as being _______.
A.
a unique representation of everyday matter
B.
alphabetically structured
C.
not symbolically expressed
【单选题】What they have done for us can't be measured in______of money.