化简18-3+63-92+(5-2)0+(1-2)2．_爱下问搜题

搜题请搜索小程序“爱下问搜题”

问题解答题

化简

18

-

3

+

6

3

-

9

2

+(

5

-

2

)0+

(1-

2

)2

．

答案

原式=3

2

-(

3

3

+

6

3

)-

3

2

2

+1+(

2

-1)

=

3

2

2

-1-

2

+1+

2

-1

=

3

2

2

-1．

选择题

By the time you have completed the essential training, you ________ exposed to virtually

every new feature of the course.[ ]

A. will have been

B. are

C. have been

D. will be

选择题

“m=1”是“直线mx+y+1=0和直线x+my=0互相平行”的（　　）

A．充分不必要条件

B．必要不充分条件

C．充要条件

D．既不充分也不必要条件