Cindy：Good morning，Eric!
Eric：Hi，Cindy!
Cindy：Is this your bag?
Eric：The green one?
Cindy：Yes．
Eric：No，it's Bob's．My bag is blue．
Cindy：I like blue．I have a blue pen．What's this in English?
Eric：It's a ruler(尺子)．It's Alice's red ruler．
Cindy：Spell it，please．
Eric：Ruler or red?
Cindy：Ruler．
Eric：R—U—L—E—R．
Cindy：Thank you．
根据材料内容判断正误
