阅读理解

    My name is Eve Smith. This is a photo of my family. There are five people in the photo. Look! The old woman is my grandma. She is seventy years old. The woman in red is my mother. She is a doctor in a hospita l. The man in a black coat is my father. He is a teacher in a middle school. This tall man is my uncle. He is my mother's brother. He is next to my mother. I'm in yellow.

   We live in this house. Look here, please! In front of our house, there is a small garden. It’s very nice. There are many beautiful flowers and some small trees in the gard e n.

下列画线的词在句中的含义解释有误的一项是（　　）.

下列各句中，没有语病的一句是（）

在学习了氢气和一氧化碳后，小明同学在弹力交流时发现一氧化碳和氢气的密度都比空气小，并且两者在空气中燃烧产生的火焰都是淡蓝色的，由此提出疑问，如何鉴别一氧化碳和氢气呢？为了解决这个问题，他回去查阅资料并设计了如下的实验探究方案．