( )是个人和群体通过创造,提供出售,并同他人交换产品和价值,以满足其欲望和需要的一种社会和管理过程。
A.市场营销 B.市场调查 C.市场供给 D.市场均衡
参考答案:A
列出真核生物mRNA与原核生物mRNA的区别。
The price of the computer is not _____ but cars are very _________.
A.high; expensive
B.expensive; high
C.high;high
D.expensive;expensive