The risk of infection for that patient hasn’t diminished after the operation.______, it has increased.

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问题 The risk of infection for that patient hasn’t diminished after the operation.______, it has increased.

选项 A、On the whole
B、On the contrary
C、On the average
D、On the other hand

答案B

解析 本题考查介词短语辨析。句意为“在手术后,那位病人的感染风险并没有降低,______增加了”。on the whole“整体上”;on the contrary“相反”,符合题意;on the average“一般说来”;on the other hand“另一方面”。故本题选B。
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