问一道托福题Paragraph5:Scientists have known for some time that certain plants,calledhyperaccumulators,can concentrate minerals at levels a hundredfold or greater than normal.■ A survey of known hyperaccumulators identified that 7 5 percent o

问一道托福题Paragraph5:Scientists have known for some time that certain plants,calledhyperaccumulators,can concentrate minerals at levels a hundredfold or greater than normal.■ A survey of known hyperaccumulators identified that 7 5 percent o
问一道托福题
Paragraph5:Scientists have known for some time that certain plants,called
hyperaccumulators,can concentrate minerals at levels a hundredfold or greater than normal.
■ A survey of known hyperaccumulators identified that 7 5 percent of them amassed nickel,
cobalt,copper,zinc,manganese,lead,and cadmium are other minerals of choice.
■Hy peraccumulators run the entire range of the plant world.■ They may be herbs,shrubs,
or trees.■ Many members of the mustard family,spurge family,legume family,and grass
family are top hyperaccumulators.Many are found in tropical and subtropical areas of the
metals may afford some protection against plant-eating insects and microbial pathogens.
13.Look at the four squares [■] that indicate where the following sentence could be
added to the passage.
Certain minerals are more likely to be accumulated in large quantities than
others.
Where could the sentence best fit?
我选了b 但是感觉加进去不对呀 如果是a的话后一句的代词them不就是指代的是miner而不是plants了么?

问一道托福题Paragraph5:Scientists have known for some time that certain plants,calledhyperaccumulators,can concentrate minerals at levels a hundredfold or greater than normal.■ A survey of known hyperaccumulators identified that 7 5 percent o
应该是a.
首先第一句和加进去的那句话有关键字重复.
其次你看这里
A survey of known hyperaccumulators identified that 7 5 percent of them amassed nickel,
cobalt,copper,zinc,manganese,lead,and cadmium are other minerals of choice.
■Hy peraccumulators run the entire range of the plant world.
B&A中都有在说hyperaccumulators,所以他们中间是不可以加上那句话的.
然后在看C,C中的they肯定就是代指前句中的hyperaccumulators,所以也不能放在这里
最后看D,如果把句子放在这里的话那D的句子就不是这样写的了,连不起来的.

应该是a吧。第一个小方块后面的hyperaccumulators应该就是具化插入句中所说的certain minerals~~

hyperaccumulators是一种植物名can concentrate minerals at levels a hundredfold or greater than normal能吸收超出平常几百倍的无机物，由后句的 A survey of known hyperaccumulators identified 指一项实验报告的例子验证得知应选A
Certain minerals ...

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hyperaccumulators是一种植物名can concentrate minerals at levels a hundredfold or greater than normal能吸收超出平常几百倍的无机物，由后句的 A survey of known hyperaccumulators identified 指一项实验报告的例子验证得知应选A
Certain minerals are more likely to be accumulated in large quantities than
others.由Certain minerals 指的就是nickel,
cobalt, copper, zinc, manganese, lead,所以选b的话不符，该文应先概述再详述

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