A______tumor, which is usually incurable, usually has a rough edge and its mass density is uneven.

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问题 A______tumor, which is usually incurable, usually has a rough edge and its mass density is uneven.

选项 A、malignant
B、benign
C、abominable
D、optimum

答案A

解析 语义辨析。题干意为“______肿瘤通常是无法治愈的,通常它的边缘粗糙且质量密度不均匀”,选项中只有malignant(恶性的,有害的)的语义能构成符合上下文语义逻辑的搭配,故只有A选项符合题意。
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