| Ⅰ | Ⅱ |
| (1) ____ Why are they famous? (2) ____ Does she like karaoke? (3) ____ What course are you taking? (4) ____ What year are you in? (5) ____ Where does Jason work? |
A.She's an actor.He's a singer. B.Cooking. C.No,she doesn't. D.My first year. E.At the computer lab. |
| Ⅰ | Ⅱ |
| (1) ____ Why are they famous? (2) ____ Does she like karaoke? (3) ____ What course are you taking? (4) ____ What year are you in? (5) ____ Where does Jason work? |
A.She's an actor.He's a singer. B.Cooking. C.No,she doesn't. D.My first year. E.At the computer lab. |
测定铅锡合金中Pb、Sn含量时,称取试样0.2000g,用盐酸溶解后,准确加入50.00mL 0.03000mol/L的EDTA,50mL水,加热煮沸2min,
设随机变量X服从区间[0,1]上的均匀分布,Y服从参数为1的指数分布,且X与Y相互独立.求:(1)X及Y的概率密度;(2)(X,Y)的概率密度;(3)P{X>Y