i+have+a+cold
奚全响2140i+have+a+dance+lesson哪里错了 -
苏晶舒13623324956 ______ I have a ( dancing ) lesson.
奚全响2140“have+宾语+带to的不定式”如何正确的理解应用
苏晶舒13623324956 ______ have 作“有”讲后加宾语加to do 不定式
奚全响2140我有几个好朋友 I have a couple of good friends -
苏晶舒13623324956 ______ a great/good many of ,quite a few/lot+c+v复数,many a+单数名词+谓语动词单数 a great/good deal of,a large/great amount of,amounts of,quite a little/bit,a large sum of+u(不可属) a large/great quantity of ,quantities of,numerous of ........a variety of(多种多样) 还有挺多的,这些是我自己归纳的
奚全响2140I have - ---- - the car for a year. -
苏晶舒13623324956 ______ I have owned the car for a year.我已经买/拥有这辆车一年了.英语中,买是一个瞬间动词,如果有表示段时间的状语不能用现在完成时态.
奚全响2140C语言中i+=a的意思是i=a++? -
苏晶舒13623324956 ______ i+=a 相等于 i=i+a
奚全响2140设A是数域F上一个n阶方阵,且A^2=A(A为幂等矩阵)证明(1)I+A可逆,并求I+A的逆 (2)秩(A)+秩(I+A)=n (3)A一定可对角化 -
苏晶舒13623324956 ______[答案] 证明:(1) 因为 A^2=A 所以 (A+I)A-2(A+I)=-2I 所以 (A+I)(A-2I)=-2I 所以 A+I 可逆,且 (A+I)^-1 = (-1/2)(A-2I). (2) 是要证 r(A)+r(I-A)=n 吧!(否则不成立) 因为 A^2=A 所以 A(A-I)=0 所以 r(A)+r(A-I)
奚全响2140数学,线性代数, 设A是方阵,A的k次方=0,k为正整数,求 I+A+(A^2)/2!+(A^3)/...数学,线性代数,设A是方阵,A的k次方=0,k为正整数,求 I+A+(A^2)/2!+(A^... -
苏晶舒13623324956 ______[答案] I+A+(A^2)/2!+(A^3)/3!+……+(A^(k-1))/(k-1)! 这个是与e的x泰勒展开相似所以原式=e^A 所以这个的逆就是e^-A 展开就是在奇数项变换符号
奚全响2140关于英语句子语法的问题Could的New as I was to the faculty, I could have told this specimen a number of things.句子中的 could+have+过去式or过去分词=语法... -
苏晶舒13623324956 ______[答案] could have done...是虚拟语气的一种,也是一种特殊的时态,表示过去本可以做某事而没有做,would,should,might也可以用这种时态.
奚全响2140我要造句6个句子,帮帮忙!!! 1、 I have...for breakfast 2、a bit+形/副(原) 3、be careful of -
苏晶舒13623324956 ______ 1、I have a piece of bread and a cup of milk for breakfirst.2、I think it is a bit difficult to make him understand me.3、You'd better be careful of the cars on the road.4、I wash my face three times a day. //////// My grandfather comes to see me once a ...
奚全响2140+I+have++braeakfast++at++8:00改成一般疑问句.肯否句
苏晶舒13623324956 ______ I have breakfast at 8:00 a.m.我早上8点吃早餐.一般疑问句 :Do you have breakfast at 8:00 a.m. in the morning?肯定句 : Yes, I do have breakfast at 8:00 a.m. in the morning否定句 : No, I don't have breakfast at 8:00 a.m. in the morning.