作业帮4a
来源：学生作业帮 编辑：作业帮 分类：英语作业 时间：2024/05/18 00:58:53
解题思路： 注意while引导的句子用过去进行时态，when引导的句子用一般过去时态
解题过程：
1. While Johh was playing the piano , Mary left the house .
John was palying the piano when Mary left the house.
2.While John was cleaning his room , Mary turned on the radio .
John was cleaning his room when Mary turned on the radio.
3.While John was shopping , Mary took the car to the car wash.
John was shopping when Mary took the car to the car wash.
最终答案：见详细解答环节
解题过程：
1. While Johh was playing the piano , Mary left the house .
John was palying the piano when Mary left the house.
2.While John was cleaning his room , Mary turned on the radio .
John was cleaning his room when Mary turned on the radio.
3.While John was shopping , Mary took the car to the car wash.
John was shopping when Mary took the car to the car wash.
最终答案：见详细解答环节
a+a^2+a^3+a^4
|a+4|+|a-2|
(a+3a+5a+...+2009a)-(2a+4a+6a+...+2008a)=
(a+3a+ 5a+```+2007a)-(2a+4a+6a+```+2008a)=?
(a+3a+5a+...+2013a)-(2a+4a+6a+...+2012a)=
计算(a+3a+5a+.+2003a)-(2a+4a+6a+...+2004a)
(a+3a+5a+.+2003a)-(2a+4a+6a+.+2004a)
化简; a-2a+3a-4a+5a-6a+``````-2006a+2007a.
计算;(a^3)^4+a^10×a^2-a×a^2-a*a^3*a^8
a(a-1)(a-2)(a-3)(a-4)因式分解
(-a)^3(-a)^2(-a)+(-a)4^(-a)^2
【1】a+a=a×a a= [ ]【2】a×a=a÷a a=[ ]【3】a×a=a－a a=[ ] [4]a－a=a＋a