OG6 阅读 Q24

Choice D is the best answer. The passage states that by using the smell of their nectar to lure pollinators like bees, Texas gourd vines are employing an "'open communication network'" that attracts "'not just the good guys, but... also ... the bad guys'" (lines 7-10,"open...bad guys"). Because cucumber beetles are then identified as some of "the very bad guys" (line 12,"among...and") as far as the Texas gourd plant is concerned, it can be inferred that both the beetles and the bees are attracted to the same scent. 
Choices A and C are incorrect because they are not supported by the text; the passage states that cucumber beetles "chew up pollen and petals" (lines 12-13,"among...transmit the") from the Texas gourd vines but not that those vines are their "primary" food source, and the passage does not address any effects, positive or negative, that cucumber beetles experience as a result of carrying bacterial wilt disease. Choice B is incorrect because the passage states that treating the Texas gourd vines with dimethoxybenzene led to "double the normal number of beetles" (lines 65-66,"What...blossoms") but that pollinators like bees "did not prefer" (line 67,"Pollinators...prefer the") the treated flowers, which implies that cucumber beetles are not less attracted but more attracted to dimethoxybenzene than honey bees are.