简述市场调查的一般步骤。
参考答案:
准备阶段、正式调查阶段、总结阶段。
Mo Yan has been the first Chinese to win the Nobel Prize in Literature, ___________ arouses people’s interest in reading his works.
A.ever; which
B.even; that
C.even; which
D.ever; that
下列说法正确的是( )
A.两个素数没有公因数
B.两个合数一定不互素
C.一个素数和一个合数一定互素
D.两个不相等的素数一定互素