【解析】动词“choose(选择)”的过去式形式为“c hose”,过去分词形式为“chosen”,名词形式为“ch oice”;固定搭配“choose...from”意为“从...中挑 选;从...中选择”,固定短语“make a choice”意为“做出选择”,固定搭配"choose to do sth.”意为“选择做某事”,"have no choice but to do st ...
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不难归纳导出一般的情况，有P_n=P_1P_{n-1}+P_2P_{n-2}+\cdots+P_{n-1}P_1=\sum_{k...
III. Choose and write.先圈出单词,然后写出中文1. a k a n g a r o o l m c h2. KI m o u se i t o t a e d. a cl m s a p p a r r ot l3.4.mroosterhacloe5.dipktigerhrtfn 相关知识点: 试题来源: 解析 3.parrot 鹦鹉 rooster 公鸡 tiger 老虎 ...
Scrunchin' their eyes with your name in their mouth and Bouncin' around bouncin' around bouncin' Hate You keep askin' me where I'm from Hate About the borders and did I run Hate Keep askin' how I feel 'bout guns Hate There's a light and dark army which side you choose Oh ...
fe c e l r v___ 相关知识点: 试题来源: 解析 a. snake b. kite c. draw d. cloud e. foolish f. clerk a. 将字母顺序排列,得到单词snake。 b. 将字母顺序排列,得到单词kite。 c. 将字母顺序排列,得到单词draw。 d. 将字母顺序排列,得到单词cloud。 e. 将字母顺序排列,得到单词...
stand in your way • Choose from 9 game-changing outfits • Build your own class with combat defining loot • Summon 12 different demon powers to crush your enemies • 4 player online, and 2 player couch co-op • Become the Victor in The Circus PvP arena • Acclaimed voice ...
Are you ready to become a grandmaster and grab a crown? Choose your hero and challenge other players in Brawl Chess, chess game with a lively cartoon style. On another side, Clumsy Rush is a guaranteed dose of a laugh for friends and family. Train your b
not much longer now not much to choose be not my mom not my own son not myth not necessarily disea not now honey mommys not nurtured not on land not on the merits but not one of them was a not ones cup of tea not only damages terr not only england not only for examinat not onl...
首先确定下界，因为\sum_{k=0}^{2n}{2n\choose k}=2^{2n}，而左边2n+1项里最大的是2n\choose n，且头尾两项都是1合并相加得到2\leq {2n \choose n}，所以{2n \choose n}\geq \frac{2^{2n}}{2n}（只在n=1时等式成立）。现在确定上界 对2n\choose n质因数分解，根据第三步结论得到{2n\...