問題詳情
21 至 25 題為題組
When a person sneezes, the droplets can spread diseases. Now research shows that plants have a somewhat 21 problem. Plant diseases can also spread through tiny water drops that jump off leaves—aplant’s versionof a sneeze.
Scientists already knew earlier that wind and splashes of rainwater can move bacteria and other germs from leafto leaf. 22 otherpossible transmissionroutes, researchersat Virginia Tech observed waterdrops on the leaves of wheat plants[!--empirenews.page--] that were infected with leaf rust. They found that the sick plants could“sneeze” and 23 tiny water drops filled with leaf rust germs, spreading the disease to neighboring plants.
The researchers noticed that small drops of water on the wheat leaves would move to combine and form a larger drop. As they were moving, the energy of the droplets in motion would be released. This energy allowed the water 24 into theair, which looked just like sneezing!
However, not all plants can[!--empirenews.page--] sneeze. The ability is 25 to those with leaves that are hydrophobic,or repel water—a special feature that forces the liquid to move away when the leaf is exposed to it.
21.
(A) similar
(B) miserable
(C) realistic
(D) temporary
When a person sneezes, the droplets can spread diseases. Now research shows that plants have a somewhat 21 problem. Plant diseases can also spread through tiny water drops that jump off leaves—aplant’s versionof a sneeze.
Scientists already knew earlier that wind and splashes of rainwater can move bacteria and other germs from leafto leaf. 22 otherpossible transmissionroutes, researchersat Virginia Tech observed waterdrops on the leaves of wheat plants[!--empirenews.page--] that were infected with leaf rust. They found that the sick plants could“sneeze” and 23 tiny water drops filled with leaf rust germs, spreading the disease to neighboring plants.
The researchers noticed that small drops of water on the wheat leaves would move to combine and form a larger drop. As they were moving, the energy of the droplets in motion would be released. This energy allowed the water 24 into theair, which looked just like sneezing!
However, not all plants can[!--empirenews.page--] sneeze. The ability is 25 to those with leaves that are hydrophobic,or repel water—a special feature that forces the liquid to move away when the leaf is exposed to it.
21.
(A) similar
(B) miserable
(C) realistic
(D) temporary
參考答案
無參考答案
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