邮政市场营销外部环境包括()和竞争环境。
A、法律环境
B、政策环境
C、文化环境
D、人口环境
参考答案:A, B, C
A dealer in a casino has rolled a five on a single die three times in a row. What is the probability of her rolling another five on the next roll, assuming it is a fair die()
A. 0.001.
B. 0.500.
C. 0.167.
正常骨髓象时,单核细胞系统一般不超过
A.1%B.2%C.3%D.4%E.5%