It can be inferred from the opening sentence of the first paragraph that medical workers ______. The word "malignant" in Line 6

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问题 It can be inferred from the opening sentence of the first paragraph that medical workers ______.
The word "malignant" in Line 6, Para. 2 could best be replaced by ______.

选项 A、harmless
B、deadly
C、effective
D、repulsive

答案B

解析 见文章最后一句,意为:目前,新发现的原子射线可帮助医生摧毁侵入人体系统的致病病菌,故B.deadly“致命的”符合题意。
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