贺知章为什么四明狂客

the old man went home.he lost his way.合并为一句 the old man ----------lost --------his way home the old man went home.he lost his way合并为一句 已知随机变量XY相互独立X-N(0,1)Y-N(1,1)下列哪个正确1 P(x+y) 设随机变量X与Y独立同分布,且X的分布率为p{x=-1}=2/3,p{x=1}=1/3,则Z=XY的分布率为? There______someone knocking at the door.Let's go to see.A.seems to have B.seems to be C.seems be D.seems have The young man didn't work hard,and he ______ lost his job.(final)适当形式填空 The xompany o—— the young man a job ,but he did not take it.根据首字母填空. 【英语】If you can talk the young man _______ learning the computer,he _______ do better in his jobA.of;wouldB.into;shallC.about;willD.on;should说明理由.shall 不是用于第一人称吗？ The young man broke his arm in the accident and had to ____ his job.send up put upget up give up 各位大神,请帮小弟分析一下这个波形变换电路的原理吗?谢谢 已知数列﹛an﹜的通项公式an=▏n-13▕,那么满足ak+a(k+1)+…+a(k+19)=102的整数有几个 求电路分析大神解答关联与非关联问题,小弟突然迷糊了电流源左正右负，电流方向是从左到右，这是关联还是非关联？电压源左正右负，电流方向是从左到右，这是关联还是非关联？ 在数列{An}中,已知An=(n+1)*(10/11)^n是否存在正整数k,使{An}中,对任意的正整数n,都有Ak>=An成立? what is your sex my friend? 请翻译：a man who fears suffering is already suffering from what he fears 已知集合A={x丨x2+2（a+1）x+a2-1=0}B={x丨x2+4x=0}AUB=A,求实数a的取值范围.正确秒批、 英语翻译Baby lock the door and turn the light down lowPut some music on that's soft and slowBaby we ain't got no place to goI hope you understandI’ve been thinking 'bout this all day longNever felt a feeling quite this strongI can't believe how 设ak=1^2+2^2+3^2```+k^2 k属于正整数 则数列3/a1 5/a2 7/a3 `````(2n+1)/an `````的前N项和是? 数列{an}满足a1=1/2,an=(2n-3/2n)an-1,求证：ak 已知数列{an},a1=1,a(k+1)=(2^k) * (ak),(k≥1),求an 谁会这道题,求求了.大神们,学霸们.求求你们了,解答一下吧,小弟求你们了.最好带一下过程.谢谢了. 若数列An：a1,a2……,an(n≥2）满足|a(k+1)-ak|=1若数列An:a1,a2,…,an(n>=2)满足|a(k+1)-ak|=1(k=1,2,…n-1),则称An为E数列.记S(An)=a1+a2+…+an.(1)写出一个E数列A5满足a1=a3=0(2)若a1=12,n=2000,证明:E数列An是递增数列 求解答要过程啊,大神快解答小弟跪了.一.一条彩带,用去的是余下的40%,用去2M这条绳子长（ ）M二.有2千克的盐水,含盐率为15%,要加入（ ）千克水,才能使含盐率降到15%三.一条彩带,用去的 反比例函数的（最好有过程）如图所示,点A,B为直线y＝x上的两点,过A,B 两点分别作y轴的平行线交双曲线y＝1/x（x＞0）与两C,D点,若BD等于2AC 则4OC²—OD²的值为 No matter what you do,don't get angry with your best friends.同义句转换 集合A=1 ,集合B=2 问这两个集合有没有交集?那么集合C=1,2 ,集合D=2,3 他们的交集又是什么?是2呢 还是2和空集? 什么是托福英语和雅思英语? 化简:(sinB-cosB)/（tanB-1） 设数列{an}满足：若n=2k-1,（k∈N*）,an=n,若n=2k,(k∈N*)an=ak求(1)a2+a4+a6+a8+a10+a12a+a14+a16 设数列{an}满足：若n=2k-1,(k∈N*）an=n;若n=2k,(k∈N*）,an＝ak求(1)a2+a4+a6+a8+a10+a12+a14+a16（1）原式=a1+a2+a3+a4+a5+a6+a7+a8=a1+a1+a3+a1+a5+a3+a7+a1=4a1+2a3+a5+a7=4×1+2×3+5+7=22想知道原式=a1+a2+a3+a4+a5+a6+a7+a8=a1+a1+a3+a1+ 化简：(sinb)^4+(cosb)^4+2(sinb)^2(cosb)^2 设数列｛An｝满足:若N＝2k－1,（k∈n）,An＝n:若n＝2k,（k∈n）,An＝Ak.求:a2＋a4+a6+a8+a10+a12+a14+a162.若Sn＝a1+a2+a3+……+a2n－1+a2n,求证:S＝4n－1+Sn－1（n小雨等于2）