【单选题】How did they go to the Expo?
【简答题】Sam and Tom are little boys. They are fight with each other. Last Sunday,their mother said to them, "It's 3 o'clock, I'm going to cook supper now.Go out and play in the garden and be good! " "Yes, Mom...
【单选题】 一盒中有4个大小形状一致的球,其中3个为红球,1个为白球,采用放回抽样,第5次取到第2个白球的概率为
【简答题】听短文,回答问题。 1. Where did Mr. and Mrs. Black go yesterday evening? A. The cinema. B. The supermarket. C. The restaurant. 2. How old was their son? A. Two months old. B. Eight months old. C. Ten months ol...
【单选题】一盒中有4个大小形状一致的球,其中3个为红球,1个为白球,采用放回抽样,第5次取到第2个白球的概率为
【简答题】In the late 1960s , motorcyclists in California , USA , ( 16 ) to go out in the countryside and ride their machines up and down mountain tracks just for fun. They made (17) noise and did a lot of dama...
【单选题】一盒中有5个大小形状一致的球,其中3个黄球,2个红球,采用有放回抽取3个球,记一共取到的红球数为X,则
【单选题】一盒中有4个大小形状一致的球,其中3个为红球,1个为白球,采用有放回抽样,则第5次取到第2个白球的概率为
【单选题】听力原文:W: How was your vacation back home in the U. S. ? M: It was great. All I did was to play and rest and have a ton of fun. W: Where did you go? M: We went to the coast to see my cousin for a couple...