How many theories does the author mention? According to the passage, why does water travel through plants in unbroken columns?

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问题 How many theories does the author mention?
According to the passage, why does water travel through plants in unbroken columns?

选项 A、Root pressure moves the water very rapidly.
B、The attraction between water molecules is strong.
C、The living cell of plants push the water molecules together
D、Atmospheric pressure supports the columns.

答案B

解析

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本试题收录于：公共英语五级笔试题库公共英语（PETS）分类

公共英语五级笔试

公共英语（PETS）

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How many theories does the author mention? According to the passage, why does water travel through plants in unbroken columns?

公共英语五级笔试

公共英语（PETS）

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