OG3 阅读 Q52

Choice D is the best answer. The table discusses pathogen occurrence in honeybee colonies, but it includes no information as to whether these honeybees were infected with mites. Because the table does not suggest mites infested the honeybee colonies, no conclusions can be made as to whether mites increased the honeybees' "susceptibility to secondary infection with fungi, bacteria or viruses" (lines 4-5"kill... viruses").
Choices A, B, and C are incorrect because the table provides no information about whether these honeybees were infected with mites.