all the ___ students in my class like football very much (boy) 怎么变形

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• V.看内容,短文填空,【don't 】【and】【boy】【have】【sports】【ball】【some】【but】【in】【they】tommy and sally are my good friends.____ are brother and sister.they are ____ the same class.in their class,some of the ____ like playing football very much.tommy is in the school football club.___ of them also like playing basketball.____ the girls like playing football.i only play ping-pong.and i ____ a small balls collection.i have 10 ping-pong ____ is good for us.tommy and sally
• ---students in my class like football very much.A The numberB A numberC The numbers ofD A small number of
• all the ___ students in my class like football very much (boy) 怎么变形
• 填入所缺的单词(thank you very much)We had no classes this m_____.All the students in our class went to visit the History Museum.I went by bus and came back o____ foot.On my way to school in the afternoon,I saw two little boys s_____ by the river.One of them was crying.I went up to them and asked,“What are crying f_____?” The other boy said,“He fell over a stone and hurt his leg.I’m his younger brother.I‘m afraid I can’t take him home.”When he said this,he wa
• ---students in my class like football very much.
• all the ___ students in my class like football very much (boy) 怎么变形
• 设A为实矩阵,证明r(A^TA)=r(A)
• 怎样判断一个矩阵能否直接进行LU分解以及分解是否唯一?希望能够给出例子,但是如果按照这个充要条件来判断的话那么下面这个矩阵是不能进行LU分解的。A=1 1 12 2 13 3 1但答案是可以分解但是不惟一。