()4.—What'sthematterwithTom?Hehasbeenabsentfortwodays.—Oh!Hebeill.Let'sgoandaskMsBrown.(2015河南)A.canB.needC.mayD.would
() 4. —What's the matter with Tom? He has been absent for two days.
—Oh!He be ill. Let's go and ask Ms Brown. (2015 河南)
A. can B. need
C. may D. would
C
简便计算1.（+1）+（-3）+（+5）+（-7）+…+(+97)+(-99)2.1/2+1/3+ 2020-04-07 …
、按一定规律排列的一串数：1/1,-1/3,2/3,-3/3,1/5,-2/5,3/5,-4/5, 2020-05-14 …
谁会用MATLAB计算 权向量矩阵是A=[1,1/2,3,1,6,8,9,1/2 2,1,5,2, 2020-05-15 …
高数极限的问题刚才搜了一个题目X趋向无穷大lim[（(2+x)^1.5-x^1.5）/[(x)^( 2020-06-27 …
(1)-22-(-1)3(2)4-5*(-1/2)3(3)(-10)2/5×(-2/5)(4)(- 2020-07-22 …
分数乘除法注：前面的数为分母,中间横线为分数线,后面的数为分子①3-1×5-1②15-1÷3-1③ 2020-07-29 …
计算,并写出过程.[1]1+7分之1-[-7分之3][2]2.5-4+[-2分之1][3]-3分之1 2020-11-07 …
（1.2+1.5+2.3）×（3.1+1.5+2.3）+（2.4+1.5+2.3）×（1.9+1.5 2020-11-16 …
序列：1/1,1/2,2/2,1/3,2/3,3/3,1/4,2/4,3/4,4/4,1/5,2/5 2020-12-05 …
计算.4÷8/3-1/2=1/5+2/7÷5/7=8÷2/3+4=25÷（1-1/6）=18÷（1+ 2020-12-26 …