People who take mega doses of vitamins and minerals should take care: though beneficial in small quantities , in large amounts t

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问题 People who take mega doses of vitamins and minerals should take care: though beneficial in small quantities , in large amounts these substances may have______effects.

选项 A、admirable
B、redundant
C、intangible
D、toxic

答案D

解析 本题考查形容词辨析。though beneficial提示,所填形容词意思与beneficial相反或相对。四个选项中,符合语义的只有toxic(有毒的,由有毒物质引起的),故答案为[D]项。admirable意为“令人钦佩的,极其出色的”。redundant意为“多余的,累赘的”。intangible意为“(性质或感受)难以描绘的;无形的”。
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