边际贡献率与变动成本率之和应当()。
A.大于1
B.小于1
C.等于1
参考答案:C
下列各组词语中读音和书写全部正确的一项是(2分)( )
A.颓(tuí)唐确凿(zào) 不能自己
B.剔(tì)透觅(mì)食人声鼎沸
C.遴(lín)选殷(yān)红蹑(niè)手蹑脚
D.挑衅(xìn)深隧(suì)鲜(xiǎn)为人知
The ratio of 2 quantifies is 5 to 6. If each of the quantities is increased by 15, what is the ratio of these two new quantifies ?()
A. 5:6
B. 25:27
C. 15:16
D. 20:21
E. It cannot be determined from the information given.