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）

Throughoutmostoftheirlives,humanbeingsperpetuallylearnandincreasetheirmentalcapacities.

Howtechnologypushesdownprice 1.Priceshavefalleninthefoodbusinessbecauseofadvancesinfoodproductionanddistr

Whatisthepassagemainlyabout?Theword"it"inline12referstowhichofthefollowing?

SportorSpectacle?MuhammadAliisprobablythemostfamoussportsfigureonearth;heisrecognizedoneverycontinentand

Thetraditionalpaintingsare(exhibited)onthesecondfloor.

Thephrase"theworld"inthefirstlineofthepassagereferstoWhichofthefollowingstatements,accordingtothepassage,

Universitiesusuallygivediplomasorcertificatestostudentswhocompletecourserequirementsadequately.

Thetiesymbolizesallofthefollowingexcept______.WhydoesBlairsometimesshowupinaformaleventwithoutatie?

知觉的对象和背景并不是固定不变的，而是相互转换的。()

以下对大承气汤主治证候的描述中哪项是错误的

原发性高血压最常见的死亡原因是

按照我国《刑事诉讼法》的规定，在下面情形下，人民检察院可以或应该作出不起诉的决定，哪些属于酌定不起诉?

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()是指调查者根据现实情况，以自己方便的形式抽取偶然遇到的人作为调查对象，或者仅仅选择那些离得最近的，最容易找到的人作为调查对象。

张明投资创办了一家个人独资企业,我国《个人独资企业法》对企业的解散作了明确的规定,下列选项中,属于法律所规定的张明的企业解散情形的有()。

青岛港是我国沿海十大港口之一，仅次于秦皇岛港为中国第二大煤炭输出港。()

代书遗嘱的见证人至少为()。

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