已知bb= [[1,2,3],[4,5,6],[7,8,9]],则表达式 [row[col] for row in bb for col in range(len(row)) if col==1 ] 的值为________。() A: [2, 5, 8] B: [1,4,7] C: [1,2,3] D: [3,6,9]

已知x=[[1,2,3],[4,5,6]]，表达式[[row[i] for row in x] for i in range(len(x[0]))]的值为（______ ）。[/i]

已知列表m=[[1,2],[3,4]]，有列表a=[[row[i] for row in m] for i in range(2)]，则a[0][1]是[/i]

下面程序运行后输出是_______。a = [1, 2, 3, 4, [5, 6], [7, 8, 9]]s = 0for row in a: if type(row)==list: for elem in row: s += elem else: s+=rowprint(s)

已知 vec=[[1,2],[3,4]],则表达式［［row[i] for row in vec] for i in range(len(vec[0]))]的值为（ )[/i]

已知 vec = [[1,2], [3,4]],则表达式 [[row[i] for row in vec] for i in range(len(vec[0]))]的值为______________()_________。[/i] A: [1, 2, 3, 4] B: [[1, 2, 3], 4] C: [[1, 3], [2, 4]] D: [1, 2, [3, 4]]

以下程序执行的结果是（ ）。#include <;stdio.h>;main(){ int i,j,row=0,col=0,m;static int a&#91;3&#93;&#91;3&#93;={1,-2,0,4,-5,6,2,4};m=a&#91;0&#93;&#91;0&#93;;for(i=0;i<;3;i++)for(j=0;j<;3;j++)if(a[i]&#91;j&#93;<;m){m=a[i]&#91;j&#93;;row=i;col=j;}printf("(%d,%d)=%d\n",row,col,m);}[/i][/i]

阅读下面程序： #include ＜iostream.h＞ void main() int i,j,row=0,column=0,m; static int a&#91;3&#93;&#91;3&#93;= 100,28,72,-30,2,-100; m=a&#91;0&#93;&#91;0&#93;; for(i=0;i＜3;i++) for(j=0;j＜3;j++) if (a[i]&#91;j&#93;＜m) m=a[i]&#91;j&#93;; row=i; column=j; cout＜＜m＜＜","＜＜row＜＜","＜＜column＜＜endl; 该程序的功能是______，其执行结果为______。[/i][/i]

What grade is the woman in A: Row one. B: Row two. C: Row four.

A row of children are standing in front of a row of chairs.