【简答题】听下面一段对话,回答第1-4题。 1. What does the woman have to do on Saturday morning? A. Catch a movie. B. Clean the house. C. Go to the doctor. 2. Where does the woman have to go at 12:30? A. To the cinema. B. To ...
【单选题】设随机变量的密度函数和分布函数分别为 f ( x ) , F ( x ) ,则下列选项中正确的是
【简答题】请听一段对话,回答第1至第2小题。 1. What does the man want to do? A. See a movie B. Go to a park. C. Watch a match 2. How much is a ticket? A. $20. B. $15. C. $5.