()1.A.At7:00.()2.A.Yes,theyare.()3.A.At5:00.()4.A.Hi.()5.A.Hello.B.InChina.B.Letmehelpyou.B.InBeijing.B.Seeyou.B.Yes,but
( ) 1. A. At 7:00. | B. In China. B. Let me help you. B. In Beijing. B. See you. B. Yes, but tired. | C. By bike. C. By plane. C. Canada. C. Nice to see you, too. C. See you. |
1-5 B C A C B |
1.a≠0,b≠0,则a/|a|+b/|b|的不同取值的个数为()A.3B.2C.1D.02.若|x 2020-03-31 …
说理由下列各式(1)±√81=±9(2)-√9分之4=-2/3(3)√(-5)的平方=5(4)√( 2020-04-11 …
基本不等式超费解130已知a>b>0,求a2+1/(a*b)+1/[a*(a-b)]的最小值.a2 2020-05-13 …
设集合A={1,a,b},B={a,a^2,ab}且A=B,求实数A,B的值因为集合需要满足互异性 2020-05-15 …
下面去括号错误的是()A.a²-(a-b+c)=a²-a+b-cB.5+a-2(3a-5)=5+a 2020-06-27 …
假设集合A满足以下条件:诺a∈A,a不等于1,则1-a分之1属于A若a属于A,则1-a分之一属于A 2020-07-03 …
一元一次方程若方程2ax-3=5x+b无解,则a,b应满足()A.a≠2.5,b≠3B.a=2.5 2020-07-31 …
幂函数计算,4/9的负1/2次方=81的3/4次方=2根号2*2开4次方*2开8次方=a的2/3次 2020-08-02 …
小明在解答题目一直a=b=5,则a与b的关系是时,得到的答案是a=b……他是这样想的因为a=b=5, 2020-12-05 …
递回关系式的运算公式(数列)以下是推导一个公式"a=a+r(1-p^n)/(1-p)"的过程a=p* 2021-01-13 …