世界战舰排名2017

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二战前国际关系格局指什么,战后又有怎样的国际关系? 求一篇以“我的责任我承担”为题的作文急 I hope you to come over to my home .的错误 等比数列的通项公式是:An=A1*q^(n-1)//A1代表什么意思 在等比数列 (a n)中a4=27 ,q=-3 ,求a7a2=18,a4=8,求a1、qa5=4 a7=6 求 a9 Excel2007中如何复制由公式生成的序列?在Excel2007中,由于公式生成的序列复制之后就是以#号开头的、没有数值;或者是将原来的数据列删除了,由公式生成的序列也变得没有数值了? 构造等比数列通项形如 a(n+1)=pan+q^n,在变形时应同时除以p^n还是q^n,或者两者都行?a1=1,a(n+1)=2an+3^n, Excel2007中如何实现求两列序列的差值序列A B C 厂商1 厂商2 厂商1 厂商2 厂商4 厂商3 厂商3 厂商5 厂商4 厂商5 如上表所示,已知序列A、序列B,如何能够求出A中非B的序列呢? 橡皮泥排开水量记录 what do you think of 相当于什么 “what do you think of”等于什么?还有同义句改写:The law requires you to wear seat belts.I will attend the meeting in place of you.The rules require us all to be present换同义词语! what do you think of等于什么 I have got a toothache and I have to go to the d ______横线上填什么?去看牙医应是go to see the dentist, what do you think of等不等于how do you think of? I has a toothache.i need to go to the _____? what do you think of it 等于what's__ it? I have a toothache.I must go to the ___ .(dentist)用括号内单词的适当形式填空 space station 可数吗 幸福 记叙作文关于幸福的文章 (记叙文) I have a toothache,I ——to see a dentist A.want B.need C.should D.must You ( )see the dentist when you have a toothache A.may B.need C.should D.can哪个哪个、急用、and Therearen't any birds in the sky同义句 一根竹笋从发芽到长大,如果每天长1倍,经过10天长到40分米,那么当长到2.5分米时候,要经过多少天? 参考答案: 此为公比为2的等比数列, 可得 40/2.5=16=2^4 (我觉得这里错了),故长到2.5分米需要10 等比数列的公比为q,那么Sn,S2n-Sn,S3n-S2n的公比为? 等比数列的a1和q的限制条件是什么? 等比数列(n×2*n),q=2,求前n项和 春天为什么又来到巨人的花园 巨人的花园 为什么没有春天 巨人的花园他想:今年的春天为什么这么冷.为什么会是这样? 飞船在距地190mi的地方飞,求周期t(min)和速度v(m/s)The space shuttle is in a 190 mile high orbitThe space shuttle is in a 190 mile high orbit. What are the shuttle's orbital period, in minutes, and its speed?物理题不会做, He has to work on weekends,____he does not like.A and which B which C and which D whose 使用情况关于which doing,which does/do什么时候用which doing修饰句子 又什么时候用which does/do 修饰句子