情景阅读。阅读短文，回答问题。
我们是好朋友
Tom and Mike are good friends. Tom is older than Mike. Mike is younger, but he is taller than Tom. Tom is 1. 67 m，and Mike is 1.75 m. Tom is 50 kg.Mike is 15 kg heavier than Tom. Tom has a dog. Mike has a dog，too. Tom's dog is smaller than Mike's. Because Mike's dog is Tom's dog's mother.
