行列式经过初等变换后

在.节日前面应该用什么介词? 表示“在哪天”的在用哪个介词 plenty of /a great many/ a great amount of/a great deal of /a lot of/后面跟可数还数不可数 a great many、a large amount of等形容量的词组有哪些,各是形容什么词的?请说全一点,并说明所修饰的是可数名词还是不可数名词 You always ___ (have) a stomach ache because you always forget ___(have) lunch. Now many children are getting fat because they do little exercise.Some of them spendtoo much time watching TV..（下面的我不打了）初中英语课课练七年级上P136页 安静用英语怎么读 安静的的英语怎么读 黄岗的一道中考题,English is spoken by ____ people 1.a lot 2.much many 3.a large number of4.a great deal of 标准答案是4.但我认为3正确,因为people是可数名词.而4是修饰不可数名词的,请赐教 1,about the room 2,for about twenty minutes 中的about是什么词性 连词成句 1.twenty,me,takes,to,it,library,minutes,about,get,the,to2.there,between,me,a,is,and,bridge,you3.want,know,how,goes,he,I,to,school,every,to,morning The station is about twenty minutes by car它的同义句是什么? thousand用法 何时加S! 到最近的医院要20分钟 It________about twenty minutes_________________________.Tom喜欢骑自行车上学.Tom______________to school____________________.许多青少年希望有一天能去参观西方国家._______________________teenagers h thousand,million之类的什么时候加s?如题 求a lot,lot of,a lots of,a few,few,many,much,a large of,the large of的用法和区别 It's about six thousand seven hundred kilometres. Chinese medicine翻译成中文 China中文怎么翻译 绿箭侠主要内容的翻译 拥有上亿身价的Oliver Queen遭遇严重的游船事故.在失踪并宣布死亡绿箭侠主要内容的翻译拥有上亿身价的Oliver Queen遭遇严重的游船事故.在失踪并宣布死亡5年后,被发现 英语作文 《我的暑假》《 我的愿望》简单一点,十句话便可,我的愿望是当医生. 英语翻译Black holes on a collision course Scientists say Chandra provides first evidence that two such mysteries can coexist in one galaxy.、 In a very bright galaxy 400 million light-years away,two black holes are drifting toward each other and 天空为什么是蓝色的呢? 天空为啥是蓝色的? 求我的暑假英语作文,四道五句话格式.带汉语. 英语翻译求翻译 Everyone in china likes dumpings very much,and there are many different kinds of dumpings.some have meat and vegetable in them,and other have sugar,eggs and pork more than any other kind 英语翻译 everyone in china likes the spring festival very much.翻译, 为什么在太空中看到的天空是黑的,而我们看到的却是蓝的? 为什么宇宙是黑的?而地球的天空是蓝的?大气层以内天空是蓝或白的,而宇宙是黑的.这是为什么? 我们都知道宇宙是黑色的,为什我们见到的天空是蓝色的呢? Have you finished your work?—No()A.not yet B.not untilCalreadyDnever