阅读短文，判断正误。

      Hello,I'm Peter.  I'm from Canada.  I'm 11 years old.  I'm 1. 6 metres and 40 kilograms.  I like reading books.  Every morning, I go to school with my good friend Ben. We go to school on foot. Ben is 10 years old.  He's 2 kilograms heavier than me. But I'm 2 cm taller than him. We study in Red Wood School. Lucy is my sister. She's 1 year older than me. She likes drawing pictures. She is taller and stronger than me.

1840年鸦片战争以来，中国的对外开放经历了被迫开放、主动开放、日益开放几个发展阶段。