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托福阅读词汇题：exhibit

2015-08-17 16:27:02来源：网络

　　【托福阅读题型：exhibit词汇题】托福阅读中词汇题是重要题型之一。根据托福阅读题型不同来进行专项练习，是短期提高托福阅读能力的有效方法。同学们需要多加练习哦!

　　查看全部：托福阅读题型分类练习之词汇题

　　托福阅读词汇题：exhibit

　　【Paragraph 2】Mineral deficiencies can often be detected by specific symptoms such as chlorosis (loss of　chlorophyll resulting in yellow or white leaf tissue), necrosis (isolated dead patches), anthocyanin formation (development　of deep red pigmentation of leaves or stem), stunted growth, and development of woody tissue in an herbaceous plant.　Soils are most commonly deficient in nitrogen and phosphorus. Nitrogen-deficient plants exhibit many of the symptoms　just described. Leaves develop chlorosis; stems are short and slender, and anthocyanin discoloration occurs on stems,　petioles, and lower leaf surfaces. Phosphorus-deficient plants are often stunted, with leaves turning a characteristic dark　green, often with the accumulation of anthocyanin. Typically, older leaves are affected first as the phosphorus is　mobilized to young growing tissue. Iron deficiency is characterized by chlorosis between veins in young leaves.　(Minerals and Plants)

　　The word “exhibit” in the passage is closest in meaning to

　　○ fight off

　　○ show

　　○ cause

　　○ spread

　　答案见下一页：

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