要为当前所有学生的年龄增加2岁,应输入的命令是（ ）。 A: REPLACE ALL年龄+2 WITH 年龄 B: REPLACE ALL 年龄 WITH 年龄+2 C: CHANGE ALL 年龄 WITH 年龄+2 D: CHANGE ALL 年龄+2 WITH 年龄

要为当前所有学生的年龄增加2岁,应输入的命令是(). A: REPLACE ALL  年龄 WITH 年龄+2 B: REPLACE  ALL 年龄  WITH  年龄 C: CHANGE  ALL 年龄+2  WITH  年龄 D: CHANGE  ALL 年龄  WITH  年龄+2

A是4×5矩阵，定义为[img=156x25]1803072cdb6f58f.png[/img]，提取[img=27x22]1803072ce50671f.png[/img]元素，第2行全体元素，第3列全体元素 A: A[[2,3]],A[2],A[[All,3]] B: A[[2,3]],A[2],A[All,3] C: A[[2,3]],A[[2]],A[[All,3]] D: A[[2,3]],A[[2]],A[All,3]

‍A是4×5矩阵，定义为A=Array[a,{4,5}]，提取[img=27x23]18030731e9d2ab3.png[/img]元素，第2行全体元素，第3列全体元素应使用的语句分别是​ A: A[[2,3]],A[2],A[[All,3]] B: A[[2,3]],A[2],A[All,3] C: A[[2,3]],A[[2]],A[[All,3]] D: A[[2,3]],A[[2]],A[All,3]

He told his wife to put (2)___________ in his casket when he died. A: all of his money B: all his money C: all the money D: all money

乙酰丙酮(L)与Al3+络合物的逐渐稳定常数的对数lgk1~lgk3分别是8.6、6.9、5.8，则[Al]=[AlL2] 时的pL约为

2) All of the UFO incidents can be explained some way.

At first it was all right because there was plenty of clean air, land and (2) .

2) All the employees of the company have become good friends with each other.

2 George<br/>took ______ granted all that his parents did for him.