Doctors are interested in using lasers as a surgical tool in operations on people who are to heart attack.

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问题 Doctors are interested in using lasers as a surgical tool in operations on people who are to heart attack.

选项 A、infectious
B、disposed
C、accessible
D、prone

答案D

解析 A选项意为“易传染的,有感染力的”;B选项意为“使愿意”;C选项意为“可到达的,易接近的”;D选项意为“易于……的,倾向于……的”,be prone to sth为固定搭配。这句话的意思是:医生们热衷于用激光为易犯心脏病的人做手术。由此可以看出只D选项符合句意,本题的正确答案为D。
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