某公司生产A、B两类产品,每类产品均有一般品和优等品两种,某月的产量如下表: A B 优等品 100 x 一般品 300 400 按分层抽样的方法在该月生产的产品中抽取50个,其中A类20个. (Ⅰ)求x的值; (Ⅱ)用分层抽样的方法在B类中抽取一个容量为6个的样本,从样本中任意取2个,求至少有一个优等品的概率.
【简答题】I’m going to graduate from my school soon, but I’ll ____it forever此题出自2015年山东青岛中考英语真题及答案,2015年山东青岛初中学生学业考试英语试题 I’m going to graduate from my school soon, but I’ll ____it forever. A. be friends with B....
【单选题】听力原文:M: I'm terribly sorry I'm late, but I just couldn't help it. I got here as soon as I could. W: Well, it's not soon enough, is it? Q: What does the woman mean? (16)