如图所示的匀强电场中有abc三点，ab相距4cm

He can neither speak English nor speak French.与He can speak neither English nor French.哪种说法对He can neither speak English nor speak French.He can speak neither English nor French.还是两种说法都可以? 请问细菌16S rDNA序列分析以后,怎么构建进化树 细菌16s rdna测序后怎么比对和构建系统发育树,老师不管我们了 break的音标是神马 mr song is ( )headmaster.A,we B,our C,ours D,us welcomes,headmaster,our,you连词组句 The pen is used by me.和The pen that is used by me is very expensive.区别?第二句是因为有了从句才加的that吗?为什么不能说The pen that used by me is very expensive. blow out怎么读 除了英语和汉语还有哪种语言普及率广, are there four season in the year 找出错误并改正.还有can john swimming in the river?would you like speak english what colour is it it's an orange.找出错误并改正. arrive,sick,big,lift的i的音标 arrive in和arrive at的区别 guest的音标正确吗 前rRNA与rRNA有什么区别 Saying is one thing and paying is ( ).Where is the money?A.one B. other C.abother D.others说明原因 英语单词绝对信心怎么写 Millie and Sandy are going to buy food(改为一般疑问句,并作肯定回答） I'm an english teacher.Sandy is tall and slim .Lucy and lily are twin.改为疑问句We're good at singing .Simon is in the Football Club .The Tv set is new . 自信的词语有那些 Tom knows little French,_______?A.do they B.may he C.does he D.doesn’t he He knows little French,and ___.为什么空处是I know little,either.而不是I know little,too. Mr yu knows little french.he can heip you改病句谁会啊 I thought you'd never ask 的意思? (a little /little/a few/few) about Japanese 选哪个? He knows a little about Japanese.对划线部分提问,划线为a little —— ——does he know about Japanese? a rose never roars 这是什么意思? when i e____ rose garden school,i thought i could have some chances.i read them like a hungry man seeing h____But all of things have gone with the wind a___i graduated. Traveling is much more comfortable by taking a car .能这样说吗 Traveling by train will be more comfortable in the future对more comfortable提问____ ____traveling by train____ _____in the future? He will go to Beijing U( ) this summer.空里面填什么我认为应该填入个副词 16S rRNA基因通用引物27F, 为什么线粒体里有16s rRNA