《2025年同步练习册山东科学技术出版社九年级英语全一册人教版》

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A new research finds that plants communicate with one another to warn of danger. We often consider plants as the furniture of the natural world. They don't move; they don't make sounds, and they don't seem to act on anything. But the truth is that plants talk to each other all the time. And the language is chemical.
Over the years, scientists have reported that different types of plants, from trees to tomatoes, give out chemicals into the air to help neighboring plants. These chemical warnings can spread information about one plant's disease or infestation(虫害), so other plants can protect themselves. But how plants receive and act is still mysterious.
In this week's Science magazine, researchers in Japan offered some explanations. They have found out one chemical message and traced it all the way from beginning to end.
They found one chemical appeared in the plants infested(感染)by a common pest(害虫). The chemical is called HexVic. The scientists discovered where HexVic come from, and put it over healthy plants. Those healthy plants were then able to produce HexVic. Researchers made sure that uninfested plants could fight off bugs and diseases. How do they know when to protect themselves? They are warned first by their friendly plant neighbors.
It is not a simple story, and it may be happening in more plant species than tomatoes. It may also be happening with more chemical signals that are still unknown to us. In a word, we know that plants not only communicate, but also look out for one another.
6. What is the language between plants?
A. Sound. B. Action.
C. Movement. D. Chemical.
(D)
7. What does the underlined word “traced” in Paragraph 3 mean in Chinese?
A. 报道 B. 怀疑
C. 跟踪 D. 发展
(C)
8. Which of the following is true?
A. Plants are like the furniture and they don't communicate.
B. We know how plants receive and act to chemicals clearly.
C. Plants communicate with each other in a chemical way.
D. Only infested plants can produce HexVic.
(C)

答案： 6.D 7.C 8.C