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问题 选择题

在草原上人工种草，为防止鸟把草子吃掉，用网把实验区罩上。后来发现，草的叶几乎被虫吃光。造成这种生态平衡失调的原因是[ ]

A．光照不足

B．氧气不足

C．植被被破坏

D．食物链被破坏

答案

答案：D

完形填空

任务型阅读。（每小题2分，共10分）

All over the world people enjoys sports. Sports are good for people’s health. Many people like to watch others play sports games. They buy tickets or turn on their TV sets to sit in front of them.

Sports change (改变)with the seasons(季节). People play different games in different seasons. Sometimes they play inside the room. Sometimes they outside. We can find sports here and there. Some sports are quite interesting and people everywhere like them. Football, for example(例如), is very popular in the world. People from different countries cannot understand each other, but after a game they often become(变得) very friendly to each other.

小题1:Sports are good for people’s _______________________.

小题2:People play different games in different ______________________.

小题3:People can play both inside and ___________________________.

小题4:___________________ is very popular in the world.

小题5:People from different countries often become ___________________ to each other.

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单项选择题

婴儿佝偻病的主要病因是( )

A．饮食中缺钙

B．甲状旁腺素缺乏

C．缺乏维生素D

D．缺乏维生素A

E．食物中钙、磷比例不当
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