二阶矩阵的行列式

回答后肯定会采纳的. 这个字拼音怎么拼?我只能手写出来,就这个“塍” What is the great importance of "the Dircovery of America"?英美概况 怎样用lots of造句 red造句 （20句左右）jjjjjjjjjjjjjjjjjjjj I am sorry,but what you said is of the ___importance to me.A least B last The teacher made (　) her duty to care for lives and study of her students 填one?that?it?this? 须鲸有哪些鲸?齿鲸呢? The new teacher made a good_on the students by her rich knowledge and humourous talk.A.feelingB.effectC.impressionD.sense答案是选了C.能问一下B为什么不行吗? 请问一角鲸(独角鲸)是属于须鲸还是属于齿鲸的?谁答得好,就有10分谁答得不太好或不好,还是会有5分希望你能给出一个正确的答案,帮助我解决难题! 鲸分为两大类一类是须鲸,一类是齿鲸用了什么说明方法 须鲸和齿鲸的分类 9.《鲸》 鲸的种类很多,总的来说可以分为两大类：一类是须鲸,没有牙齿；一类是齿鲸,有锋利的牙齿.这句话运用了哪些说明方法? The singer---------- (sing) three songs on TV once a month.用所给词的正确形式填空. 2.I can sing a song on the school music festival.（对 sing a song 进行提问）______ ______ you ______ on the school music festival?要在17点35之前 like sing songs singer上面词语各造like sing songs singer上面词语各造一个句子 can you sing the song ____ Once More(昨日重现） 六年级下册数学题,我要急哭了!5555555化简比 1.5：3.5 1又5分之3：1.8 9分：0.4小时 求比值 3.75：1又2分之1 1.35:2.4 2又3分之1：3又2分之1 解比例 6.5：X=3.25：4 4分之X=5分之6 3分之2：4：X=2分之1 X分之3 what is quebec in french what is montreal in french 初二英语知识点总结 上学期的 I'm not good at basketball,but I often enjoy watching my brother___ it play playing to play说明理由, 跪求初二英语知识点! lots of后能加不可数名词吗?如lots of information 智者们帮帮忙 英语翻译翻译一下句子（回答有好评）1.He shaved hurriedly this morning and cut himself badly.2.He took a cake and ate it quickly.3.I met her in the street the day before yesterday and she greeted me warmly.4.The bus went slowly yesterd 有描写田园风光的好段吗?有就发过来,不要句子 2009年新词新语中教育领域的28个新词条具体是什么 牛的种类 牛的种类有哪些 牛有多少种类? 货币定义