中国网民素质低的可怕

请以“世上最痛苦的事”为题,写一篇不少于800字的文章.二轮模拟～ We don't leave until he comes 这个句子对吗 怎么翻译. 高中生物的肽链数是n,那么所有的氧原子总数是多少(不算R基上的） ()don't leave until he ___back A.have comeB.comes C.will come D.came 关于肽链的计算等问题某一条肽链有100个氨基酸组成,现去掉2个氨基酸（R基为——H）,形成三条肽链.下列叙述正确的是A 肽键数目减少了3个B 相对分子量减少了150C 氨基和羧基分别增加4个D 氧 they won't leave here until Tommy ___(return).理由 肽链的计算怎么算? 肽链的计算已知某一多肽链的分子量为10320；每个氨基酸的平均分子量为120.每个脱氧核苷酸平均分子量为300.那么合成该多肽化合物的基因的分子量为多少?正确的步骤是10320除以（120-18）=10110 为什么有的植物新长出的叶子颜色比老叶子浅?（浅绿） worry是抽象名词吗,哪些是抽象名词 Rock music makes them excited.还是Rock music makes them exciting? I’m afraid the meeting has begun.Don’t worry.It___until the bell____.A..doesn’t begin;rings B.won’t begin;will ringC.won’t begin;rings D.doesn’t begin;will ring请说原因 it was not until the meeting was over that he began to teach me english这句话主语是什么 The meeting is no over,and you___not leave.A will B shall C may D need 为什么选B? The exciting ( ) make us excited.A.news B.informtions C.messages我除啦知道2B不对之外 A C的区别能详细讲一下么 Mr.Green won't leave here until his wife ____ back tomorrow.A.come B.cameC.comes D.will come选什么?为什么? 英语翻译要那种书面正版翻译的,包括名字也是中文翻译的, 英语翻译要官方的 名字也要翻译的 Y confidence 快乐的形容词是什麽? 乐事薯片是不是中国的 "l gain "confidence" from my hobby 作文"讲打羽毛球的。最好15分钟内回答。 我是一个高中生 、怎么让英语在一年之内有显著的提高 、我什么都不会,单词干脆就没背过干脆就没有基础 单词毛也不会 ,不怕辛苦 ,只要办法可行有效就可以 confidence是什么意思Not because there are some things hard to do, we lose confidence这句话的中文意思是什么 get,gain,obtain,attain,acquire,作”得到”意思时有何不同? obatain gain acquire 这三个词的区别 How long did you stay there? 应该怎么回答 1元的乐事薯片有多少克? they were expect to be here an hour ago,but they haven't appeared so far(同意句) they were _ be hethey were expect to be here an hour ago,but they haven't appeared so far(同意句)they were _ be here an hour ago,but they haven't appeared so far Be supposed to do 和 suppose to do 有什么区别比如：I am supposed to be calling you to dinner 和 I suppose to call you for dinner.另外,不定式的进行式在表达上有什么功能. To keep --------- good health,you should eat less fast food. She used a knife to kill the duck at food.改错 fast fast