":"is the weighing comparison;

"> to determine the relationship between light and heavy;

"?" For the undetermined light and heavy relationship.

1、A:B

2. A: A.

One: d

4. a: e

If b? C & gtA & gtd？ E

5、B:C

6、D:E

All right.

If b? c？ D & gtA & gtE

5、B:C

6、B:D

7、D:C

All right.

If b? c？ d？ E & gtA

Bad luck. Not good.