利润是收入与费用配比相抵后的差额，是经营成果的最终要素。
参考答案：对
I ______ the poor rabbit, but I didn't have the right drugs with me at that moment. [ ]
A. saved
B. had saved
C. could save
D. could have saved
我国护照颁发给年满（）周岁的公民。
A、14
B、16
C、18
D、20
