丙二烯结构式

When he was young,he used to_hard at his lessons. A.devote to working B.devote himself to work C.be devoted to work D.be devoted to working 求权威解答,不肯定的别瞎掺和. ___wants to go rafting this weekend ,raise your hands.中的raise是不是应该写成raises 提问几个英语单选题1.We look forward to the day when the car will be replaced by some less dangerous ( ) of transport .A.methods B.means C.manners D.ways2.Please ( ) me ( )your wife and children .A.remind ,to B.remember,of C.remember ,to D.re Anyone (who wants to go rafting this weekend ,) raise your hand,please.定语从句,为什么不用raises 我要提问我要提问 英语单选题!-- China is __ third country to sent a person in to space.-- As __ Chinese student ,I am very proud of my country.A.the; a B.a; a C.不填; a D.the; 不填最重要的一点是 _A_wants to go rafting this weekend ,raise your hand ,please.A.Anyone who B.Those who 为啥不选B __6__flowers and a bed __7__in their room. When he was young,he used to spend his ______ time collecting stamps. 英语翻译浅论新时期我国档案管理工作的基本特点：本文以改革开放为分界线,通过对比1978年前后我国档案管理工作情况,将我国新时期的的档案管理工作的基本特点概述为档案的来源与主题 请帮我翻译成英语,自己翻,不要用机器翻好的词汇,并不是通过阅读根据一定年龄段的词汇来编写的书籍而获得的.而是通过阅读超越自己年龄的书籍来获得的. 魔方、拼完第一个面、然后怎么拼? 魔方最后一个面怎么弄?前俩个面我都会弄了、就最后一个面我不会弄、谁能告诉我怎么弄?别弄什么公示、我看不懂那东西、要是给我弄个我能看懂的也行 魔方怎样变出一面?就一面! A desk is near the bed.Some flowers are in it.A bookshekf is behind the bed.翻译 1.Does formula f(x)=1/(x²-2) define a function f:R->R?A function Z->R?2.If there are 2187 function f:A->B and |B|=3.What is |A|?3.Give an example of a function f:A->B and A1,A2 in the A for which f(A1∩A2) ≠ f(A1)∩f(A2)4.If A={1,2,3,4,5} an He studied hard at school when he was young.___leads to his success in his late lifeA what B which C that D so that为什么不选C 选A 怎么看的呢 He lived a hard____when he was young.这空格怎么填.填什么词? 1.20吨比多少吨少5分之1 2.一台收音机原价100元,先提价百分之10,售价又减价百分之10,售价是多少元急 男闺蜜是什么意思?能解释一下吗? 一边相等,其余两边对应平行的三角形是全等三角形 设*是集合A上可结合的二元运算,且对于任意的a,b属于A,若a*b=b*a,则a=b.试证明对于任意的a属于A,a*a=a,即a是等幂元；对于任意的a,b属于A,a*b*a=a；对于任意的a,b,c属于A,a*b*c=a*c. 一箱苹果吃了全部的百分之45,还剩这箱苹果的（ ）10秒在线时间, when do you P.E.class? 急, 高中生物复习提纲 谁有生物复习提纲 谁有生物的复习提纲 .At( ),I ( ), then I ( )at ( ).I( ) at ( ). As for weekends ,I ( )on ( ).On( ), I usually ( ) 填单 前面是对X求导后面又是dy是什么？ 图中对x积分是如何变到对α积分的 英语翻译 英语报刊选读 难不?我是计算机系的大一学生,我们现在再选公选课,我想选英语报刊选读,不知道这门课难不难,适不适合现在学?