按国家标准《常用化学危险品贮存通则》(GB 15603—1995),危险化学品储存方式有三种,下列不属于标准规定的储存方式的是()。
A. 隔离储存
B. 隔开储存
C. 毗邻储存
D. 分离储存
听力原文:M: We have a few specials on the menu this evening.
W: Which one would you recommend?
Q: What's the possible relationship between the two speakers?
(2)
A. Customer and waiter.
B. Wife and husband.
C. Boss and clerk.
D. Father and daughter.
如果各种商品的销售量平均上涨5%,销售价格平均下降5%,则销售额不变。
A. 正确
B. 错误
在右偏态分布条件下算术平均数、中位数和众数的关系表现为 ()。