随机变量x与y相互独立

______________基因的编码序列基因中的编码序列 包不包括 内含子?那到底 编码序列 是 什么？ 用严组词!（ ）的队伍 （ ）的结构 谢谢虾米们! 虾米这个词咋来的 六年小学英语语法小学英语语法有哪些 小学英语六年级语法口诀 What's the l_____ expensive way to travel by train,by bus or by air?首字母填空wiwicat ,但它是两者比较啊....不好意思..看错的 ____ is the most expensive way to travel ---by plane .A.how B.when C.what D.where It 's expensive_______by plane,but it' s much faster.（travel） 我与饮食文化 作文中文600字 there is this man这样可以表达吗 Young as I am – just sixteen ,and there was this old man who .此句不懂Young as I am – just sixteen ,and there was this old man who must have been usefully engaged perhaps before the sun appeared above the horizon.此句语法结构? and是什 DNA编码区中的内含子和外显子是什么 基因中的内含子与外显子帮我说明下它们的作用 DNA编码区的外显子,内含子和非编码区的RNA聚合酶结合位点分别有什么作用? 今天英语老师对乐乐干了什么? Tom got a job to supplement the family incometo可以不要吗?我怎么想不到? as if to do () is from Kunming to Beijing,It is threehours by plane what's the price of a plane ticket of the UK or what's the price of a plane ticket to the UK -Mr.Smith ,what brings you to Kunming - _____ .A.I came here by plane B.I'm here on business为什么选B,请详解, 角色的读音谁会?是jue se,还是jiao se 在英语里coms been、must been和may been和come have been、must have been和may have been的区别?请举例!哪些词是宾语、定语、介词,请举例!coms应该是comes 角色的2个读音是什么意思呢?百度知道里查到的:角色 jiǎosè (1)如小说或戏剧中的人物 (2)某一类型的人物 角色 juésè 演员扮演的剧中人物 英语must +have+动词的过去分词怎么用 除英语外什么语言好学 想学一门除汉语英语外的语言,哪种比较好学? 我想自学一种语言（除英语）哪种比较好学适用?不怎么用语法的 我的英语挺好 但是语法几乎不懂 我也不知道什么回事 所以自学的语言最好别太注重语法 Who will make a model plane ( )(to,for) the little girl?括号里应该写to还是for呢? 英语听力题：-----How many people will go to the picnic?A.There B.Five C.Four 听力材料——----Who will go to the picnic tomorrow?-----Mary,Lucy and her friend.这题答案选C,但我觉得应该选A,her friend 指谁的朋友啊? Both the girl and her dog ____ were crossing the street were hit by a coming car.A.which B.who C.they D.that求详解选D 有一个两岁多的女孩,左耳听力约为70分贝,右耳听力约为90分贝,该小孩现在还不会说话,如何治疗?有一个两岁多的女孩,左耳听力约为70分贝,右耳听力约为90分贝,该小孩现在还不会说话, my,do,too,i,homework(.,)