【单选题】市场上某商品来自两个工厂,它们市场占有率分别为60%和40%,合格率分别为90%和85%,有一个人任买一件。 则买到合格品的概率为
【单选题】—Scott is good at painting. —Yes, his painting is very beautiful. And he can _________ dance very well.
【单选题】He ______ dance very well.
【判断题】在i和n一定的条件下,通过设计流量所需要的最小过水断面称为实用经济断面。()
【判断题】变速器的锁止结构是锁止拔叉,使拔叉不能拨动齿轮。
【判断题】在i和n一定的条件下,通过设计流量所需要的最小过水断面称为实用经济断面。
【简答题】Henry cannot dance very well at all. He is always tripping over his partner. Henry .