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高中英语-外研版必修5精选试题:课时达标训练24
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  • 资源类别试题
    资源子类章节测试
  • 教材版本外研版(现行教材)
    所属学科高中英语
  • 适用年级高二年级
    适用地区全国通用
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  • 更新时间2018/6/26 9:18:13
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资源简介
Module 6 课时达标训练(二十四)
 
Ⅰ.阅读理解
Living in the wild can be hard. Finding food and staying safe aren't easy. Each day, animals struggle to sur-vive in their habitats. Not all animals get by on their own. Some animals form a close partnership with other kinds of animals. These pairings are called symbiotic (共生的) relationships.
In a symbiotic relationship, the animals depend on each other. One animal helps the other meet its needs. Sounds good, right? Not always. Some animals are not very kind to their partners. In some cases, one animal meets its needs but hurts its partner. Take ticks (壁虱) for example. These insects suck blood to live. To get blood, they attach themselves to other kinds of animals. Ticks can pass germs that cause disease instead of helping their hosts.
In other relationships, animals don't treat their part-ners so poorly. Both animals benefit, or get help, from living with the other animal.
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