dict([('xy'[i-1],i) for i in range(1,3)] ) 怎么理解,为什么结果是{'y':2,'x':1}

dict([('xy'[i-1],i) for i in range(1,3)] ) 怎么理解,为什么结果是{'y':2,'x':1} -dict I count on you怎么翻译是我依靠着你吗?可是count是这个啊http://dict.baidu.com/s?wd=count&tn=dict谢谢 英语翻译翻译句子：1 By the time I got up,my brother had already gotten in the shower.2 When she got to school ,she realized she had left her backpack at home.3 I only just made it to my class.4 Could you please tell me where I can get a dict 已知（x+1）*（x+1）=-Iy-1I,求2（xy-（5xy）*（5xy））-3（（xy）*（xy）-xy） dict是什么 dict是什么意思? 若Ix-1I+Iy+2I=0,则xy等于_____.快 x,y∈R,x/(1-i) -y/(1-2i)=5/(1-3i)则xy=( ) 英语题,速度来III.将下列句子改为否定句jane is a techer.i will give her a call.i like English very much.he likes to sing English songs.i think it is right.jim can play computer games.i know her name.she likes volleyball.that is his dict 计算(i^2+i)+|i|+(1+i) mathematica最小二乘法曲线拟合问题x = Table[100 + 10*i, {i, 0, 9}];y = {45, 51, 54, 61, 66, 70, 74, 78, 85, 89};xy = Table[{x[[i]], y[[i]]}, {i, 1, 10}]ListPlot[xy, PlotStyle -> PointSize[0.015]]q[a_, b_] := Sum[(b + ax[[i]] - y[[i]])^2, {i i/1+i等于 实数X、Y满足（1－i）x+(1+i)y=2,则xy的值是? 如果(x+y)+(y-1)i=(2x+3y)+(2y+1)i 求实数xy的值. SUM(IF(I:I=,,1/(COUNTIF(I:I,I: 已知z=x+yi,xy属于R,i是虚数单位若复数z/1+i +i是实数z的模的最小值是多少呢? 已知z=x+yi,xy属于R,i是虚数单位若复数z/1+i +i是实数则z的模的最小值是多少?