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【单选题】
[ 大化 2012] 在标准状况下,气体 A 的密度为 0.09 g × dm -3 ,气体 B 的密度为 1.43 g × dm -3 ,气体 A 对气体 B 的相对扩散速率是( )A.
1:16
B.
1:4
C.
4:1
D.
16:1
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皮皮学刷刷变学霸
举一反三
【单选题】He 'took the chair' for all the following reasons EXCEPT that______.
A.
he got to the chair first.
B.
he happened to like the seat.
C.
his wife ordered him to do so.
D.
he'd walked ahead of his wife.
【简答题】我的妈妈近视了,( )上了眼镜。
【单选题】He' took the chair' for all the following masons EXCEPT that ______.
A.
he got to the chair first
B.
he happened to like the seat
C.
his wife ordered him to do so
D.
he'd walked ahead of his wife
【简答题】某款商品公司决定从今天开始要做促销,5折销售,价格标签还没来得及更换,A顾客不知道这个信息,售货员以原价将此商品卖给了A顾客,B顾客看到报纸的促销广告过来购买,售货员以5折的价格卖给B顾客。你认为这属于什么价格策略?售货员这样做合适吗?如果顾客发现了这张登有促销信息的报纸,要求退款,应该怎么办?
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