Whether substances are medicines or poisons often depends on dosage, for substan

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问题 Whether substances are medicines or poisons often depends on dosage, for substances that are (i)______in small doses can be (ii)______in large.

选项

答案 C，E

解析逗号说明前后同义重复。第一空与medicines(药品)同义重复。useless无效的，mild温和的，curative有疗效的。答案选C。第二空与poisons(毒药)同义重复。miraculous奇迹般的，toxic有毒的，innocuous无害的。答案选E。

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