The biochemistry instructor urged that we take particular care of the________chemicals to prevent their evaporation.

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问题 The biochemistry instructor urged that we take particular care of the________chemicals to prevent their evaporation.

选项 A、insoluble
B、superficial
C、extraneous
D、volatile

答案D

解析 本题考查形容词辨析。根据evaporation(挥发,蒸发)判断,这些化学品具有挥发性,volatile意为“易挥发的,易发散的”,符合语义,故答案为D项。insoluble意为“不能溶解的,不溶的”;superficial意为“表层的,表皮的”;extraneous意为“没有直接联系的,无关的”。
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