重庆一中生物课外小组的同学正在调查校园里的生物，他们发现了蜗牛、小鸟、蚯蚓、蘑菇及各种树木花草．下面是大家对这些生物共同特征的概述，其中错误的是（  ）

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     My name is Chen Yang. I'm twelve years old. I'm a Chinese student.

     There are four people in my family—my father, my moth er, my brother and I. My father is a doctor at the City Central Hospital and my mother is a theatre manager. My brother is a student, too. He is thirteen. We are in the same school, but not in the same class.

I like English very much. I can speak a lot of English. I want to have an American pen friend. Let's be friends, OK? Please write to me. My address is No. 22 Middle Sc hool, Hunan, China. My email is Cheny @ hotmail. com.

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