While some bacteria are beneficial, others are ______ in that they cause disease.

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问题 While some bacteria are beneficial, others are ______ in that they cause disease.

选项 A、detrimental
B、prodigious
C、intrusive
D、mordant

答案A

解析 detrimental有害的,不利的;prodigious很大的,奇特的;intrusive冒昧闯入的;mordant讽刺的,尖酸的。根据句式while some. . . others判断,应选择beneficial的反义词,故选A。
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