Question

1.2.3.4.5题怎么做

Answer 1

1. a=0,b=-1,c=0;a-b+c=1.选C

2. A

3. A

4. 互为相反数的两数的积为非正数.选D

5. B
   

Answer 2

1c2c3b

追答

4c5b

Answer 3

1A

Answer 4

1c2B3B4C5B

Answer 5

几年级的作业

追问

七