什么叫四字成语

Steps are being taken to reduce traffic con- gestion during peak hours. —— in the traffic jam for two hours,they were late for the wedding partyA.Stuck B.Having stuck 答案选得是A 我觉得应该选B 外显子中部是否可以反转录出终止密码子 Studies reveal that people spent two hours dreaming every night,no matter what they during the dayAshould Bwould have done Cmay have done Dmust do为什么不选B而选C 一个基因的起始密码子在第二外显子上,启动子区域应该怎么找?是转录起始位点前2000bp还是起始密码子前2000bp? The traffic was too busy.So they were late 同义句转换The traffic was too busy.——they were late they invited my friend ,cousin ,uncles and aunts,and grangpaents. 为什么用两个and? "form Monday to Friday"的另一种说法（同义句）form Monday to Friday的同义句 the student go to school earlier ever day.改错 this is a loose comfortable outfit you wear when you exercise 是神马单词（t开头）KET women（单数）（ ） man（复数）（ ）buy（三单）（ ）sell（反义词）（ ）do（三单）（ ）pla（三单）（ ）------按要求写出以上单词的适当形式. 请问go to the park中的the是表示什么,为什么把go to the park的过去式went to a park就是用a呢?如题 Wear a comfortable elasticbandage for support. 您好,请问 They look wear comfortable是病句吗 the first man in history to set world records in all 3 at a single olympics什么意思 造5个句子 将主动语态改为被动语态 1 The students sweep the classroom every day.2 she heard a terrible voice last night.3 they will finish their task tomorrow.4 she said she would write a poem for her parents.5 the scientists are doing experiments now agree in with other half an hour的意思是什么? half an hour ago 什么意思? there is no room翻译 master of social studies出来能做什么呢在新加坡 As I was busy,I told her I couldn't help _____ the meal.a.to prepare b.preparing c.prepared d.being prepared希望能给出为什么选的原因. I just couldn’t help ________ _________ _________ __________ the painting.我情不自禁地喜欢上了这幅画. tSocial studies is one of ( ).A.favourites;B.my favourite subject;C.my favourite subjics;D.my favourite.选哪个？还有说一下理由 英语翻译若第一个起始密码子突变成终止密码子,这段基因还能翻译吗 英语翻译RT.请详解. Most of the _____ (kid) are very lovely . A crow is thirsty.He finds a bottle with a little water in it.But the bottleneck is too long ,the crow can't get the water.He thinks and thinks ,and then he has a good idea.He puts some pebbles in the bottle ,and the water rises up.Now he can drink t 改错(每句一处错):I'm very thirsty,but there is a little water in the bottle I'm thirsty,but there is ____ water in the bottle.A.fewB.a fewC.littleD.a little 填冠词 （）crow is thirsty.He finds()bottle with()little water in it.But the neck of ()bottle is toolong,he can·t get () water.()crow thinks,and then he has () idea.He puts () some pebbles in () bottle,()water rises up.Now he can drink () water