题目

关于叶肉细胞在光照条件下产生ATP的描述，正确的是（   ） A．无氧条件下，光合作用是细胞ATP的唯一来源 B．有氧条件下，线粒体、叶绿体和细胞质基质都能产生ATP C．线粒体和叶绿体合成ATP都依赖氧 D．细胞质中消耗的ATP均来源于线粒体和叶绿体 答案：B 解析: 无氧条件下，光合作用、无氧呼吸是细胞ATP来源；叶绿体合成ATP不依赖氧；细胞质中消耗的ATP主要来源于线粒体。 阅读表达（共5小题；每小题1分，分）Mr Smith is a teacher. Yesterday he did a survey（调查）of what his students did on their last day off and this is what he learned.Linda went to see her grandparents. Her grandparents live in the countryside. They are very old. But they don’t like to live in the city. They want to have a quiet life. Tom helped his parents do some housework. He cleaned the room，washed all the clothes. At noon，he helped his mother cook the lunch. Mary babysat（照顾）her little brother because her mother was ill. Her father had to look after her mother in the hospital. Mike studied history at home. He isn't good at history. He thinks it is too difficult for him. His father helped him. Both his father and his mother hope that Mike Can be good at all his subjects. They want him to study in a famous（著名的）university（大学）.（一）根据短文内容简要回答问题。1.Where do Linda’s grandparents live?__________________________________2.Why did Mary babysit her little brother?__________________________________（二）将短文中画线的句子译成汉语。3. __________________________________4.__________________________________（三）请给短文拟一个适当的标题。5. __________________________________