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高中概率题目一个袋装有黑球白球共9个,从中任意取3个,记随机变量X为取出的白球的个数,已知P(X=3)=5/21. 求白球个数. 求随机变量X分布列和数学期望 I wil always I love you是啥意思 28课《我的舞台》第7自然段的动作词语体现了什么? Could you please和 Could I please 句型Could you please.5个 Could I please 3个 Could_______Mike,please?Don't read ____It's bad for you eyes.It is e___pecil I will____with MikeCould_______Mike,please?Don't read ____It's bad for you eyes.It is e___pecil.I will____with Mike this week.(1)white (2)play cards (3)in bed (4)speak 这 关于“could I ..”“Could you please...“的英语对话编一个英语对话.要有情节.对话里要穿插如题的两个句子. A:Hi,Mike!Could you please play pingpong with me?B:I'm sorry,but I(1)A Why?B I have to stay at home to look (after) my grannyA (What's)the matter with herB She said she had a coldA I'm sorry to (hear) that.Did she go to see the doctor?B Yes,I (2) her I always stay here.I'm so said heihei.I always stay here.I'm so said today1 I don't know if ny uncle If he I will be very happyA comes ；will comeB will come ；will come C comes； comesD will come；comes Do the monkeys like the hats?(怎么回答) my email address是什么意思 英译汉：the hotel provides foreign guests with very good service. The good service of the restaurant()the poor food to some extent这句话啥意思啊,为啥选A made up for a B made for c made out D made use The service in that hotel is quite good. 英语翻译前面都懂，后面加个one Little chips light great fires. 电邮地址是什么? 语法填空 John ,a teacher,who graduated from Qing University in 1998_______he get master degreeget没弄时态- -，改got 为什么要填你的答案？~ What I want to do is to be more like me and be less like anyone else! His bike is broken on the way to school (对划线部分提问）说明一下 画线部分是His 需要买个喷涂遮蔽塞,哪家好? the boy is （几乎）late for school again. 英语脑筋急转弯 Why is the little boy late for school?Why is the little boy late for school?（小男孩上学为什么迟到?）请用英文回答 Candy这英文怎念 candy和candies的区别具体一点 可以吗 25#钢与WCB有什么区别? 用candy造句 WCB 和ZG230-450有什么区别? candy 几个音节 阅读jim的信,帮助他改正句子错误 Dear Candy,I love Sam.He's a good pet.He's fun and he's a good fri阅读jim的信，帮助他改正句子错误 Dear Candy,I love Sam.He's a good pet.He's fun and he's a good friend.Iremember the one time w what is more有更好的是的意思吗 what kind of store would you like to go.to.