高中英语语法-说明文阅读理解备考策略之一_高考语法

高中英语语法-说明文阅读理解备考策略之一

　　　　6.新产品使用方法判断题

　　　　科学的发明创造都应推广使用才能转化为生产力，因此科普说明文阅读材料常出现新产品使用方法判断题，这种试题常以What is the correct way to use the new invention？或How can you use the new product？或What should we do to use the new product？为设问方式考查对新产品使用方法的判断。解题时应认真阅读原文介绍新产品使用方法的注意点，从而找到新产品正确的使用方法。

　　　　[真题演练]

　　　　Animals can move from place to place，but plants cannot. When an animal is under attack，it can run away or fight back Plants certainly cannot run away，and they lack teeth and claws. But plants can defend themselves by using both physical and chemical means.

　　　　Some plants have their own ways to keep animals away. For example，the leaves of the holly plant have sharp spines （刺）that discourage grass-eating animals. Holly leaves on lower branches have more spines than leaves on upper branches. This is because the lower leaves are easier for most animals to reach

　　　　Some plants，such as the oak tree，have thick and hard leaves that are difficult for animals to eat. Some grasses may contain a sandy material； eating such grasses wears down the animals teeth.

　　　　Many plants also have chemical defenses. Some plants produce chemicals that taste bitter or cause an unpleasant reaction. Some plants may fight against an attack by increasing the production of these chemicals. When a caterpillar （毛虫） bites a tobacco leaf，the leaf produces a chemical messenger. This messenger sends to the roots the information to produce more nicotine. The higher levels of nicotine discourage the caterpillar.