2. 外语
  3. How many diseases are known to attack wheat? According to the passage, some plant diseases can be prevented by______.

How many diseases are known to attack wheat? According to the passage, some plant diseases can be prevented by______.

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问题 How many diseases are known to attack wheat?
According to the passage, some plant diseases can be prevented by______.
选项 A、killing parasites
B、inoculation
C、killing insects
D、improving growing conditions
答案B
解析 该题问“根据原文，可以通过采取什么措施来防止一些农作物疾病的发生?”A说“把寄生虫杀死”，D说“改善农作物的生长条件”，C说“把所有的昆虫都杀死”，这三个选项在文章中都没有提到，所以选择B。
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