8.(2015常州,7)—JennywillyouleavefortheUSAnow?—No.ItwillbetwoweeksIleavehere.A.untilB.sinceC.beforeD.when
8. ( 2015 常州,7) —Jenny will you leave for the USA now?
—No.It will be two weeks I leave here.
A. until B. since C. before D. when
以下算式怎样简便怎样算(写出步奏)谢谢!2005×12/20044-(5/7+1/3)-2/7(3 2020-04-07 …
初一数学帮帮忙`,求你们拉2/1×3=1/1-1/312/3×5=1/3-1/522/5×7=1/ 2020-04-07 …
分数的运算和解方程1、2又2/3*8*1又3/8= 2、1又2/5*25+5又3/4÷5又3/4= 2020-05-16 …
1+1/1*3+1/2*3+1/2*5+1/3*5+1/3*7+1/4*7+1/4*9原式=2*[ 2020-06-11 …
1.求数列11,103,1005,10007.前n项和2.求数列1/1.5,1/3.7,1/5.9 2020-06-12 …
用递等式计算.①6.75+117÷3.6-0.35②(6+10.88÷3.2)×1.5③21.5÷ 2020-07-18 …
设非空集合A{1,2,3,4,5,6,7},且当a∈A时必有8-a∈A,这样的A共有(15)个.{ 2020-08-01 …
1.将1,-1/2,1/3,-1/4,1/5,-1/6,1/7...按规律排列如下:1-1/21/3 2020-11-30 …
设非空集合A{1,2,3,4,5,6,7},且当a∈A时必有8-a∈A,这样的A共有(15)个.{4 2020-12-07 …
数学数列列项相消法1/1*5+1/3*7+1/5*9+.1/(2n-1)(2n+3)这样的数列,把它 2020-12-23 …