求教托福多选题题干后跟的一句是什么。。。

lizzyq · 发表于 2012-10-11 15:34:08

比如这题，给了directions不就行了么，为什么后面要来一句Plants need to absorb certain minerals from the soil in adequate quantities for normal growth and development.这句是例子？还是别的什么。。。

  14. Directions: An introductory sentence for a brief summary of the passage is provided below. Complete the summary by selecting the THREE answer choices that express the most important ideas in the passage. Some answer choices do not belong in the summary because they express ideas that are not presented in the passage or are minor ideas in the passage. This question is worth 2 points.

lants need to absorb certain minerals from the soil in adequate quantities for normal growth and development.
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Answer Choices
  ○Some plants are able to accumulate extremely high levels of certain minerals and thus can be used to clean up soils contaminated with toxic levels of these minerals.
  ○Though beneficial in lower levels, high levels of salts, other minerals, and heavy metals can be harmful to plants.
  ○When plants do not absorb sufficient amounts of essential minerals, characteristic abnormalities result.
  ○Because high concentrations of sodium chloride and other salts limit growth in most plants, much research has been done in an effort to develop salt-tolerant agricultural crops.
  ○Some plants can tolerate comparatively low levels of certain minerals, but such plants are of little use for recycling nutrients back into depleted soils.
  ○Mineral deficiencies in many plants can be cured by misting their roots with a nutrient solution or by transferring the plants to a soilless nutrient solution.

hj12321 · 发表于 2012-10-12 10:24:49

那是题目中的：An introductory sentence for a brief summary of the passage is provided below
楼主要看题目哦

lizzyq · 发表于 2012-10-12 13:00:13

太谢谢你啦。

[报考] 求教托福多选题题干后跟的一句是什么。。。

所属分类: TOEFL / IELTS

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