There is no denial that in the tropical area there is a high ______of malaria.

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问题 There is no denial that in the tropical area there is a high ______of malaria.

选项 A、incident
B、incidence
C、accident
D、precedent

答案B

解析 incident事件；incidence发生率；accident；事故：precedent前例。该句中tropical和malaria分别是“热带的”和“疟疾”。故选B项。

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