In comparison with traditional homes the advantages of modem self-sufficient homes are______. It is implied that the ozone hole

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问题 In comparison with traditional homes the advantages of modem self-sufficient homes are______.
It is implied that the ozone hole over Antarctica is______.

选项 A、a threat to the European people
B、a risk to human health
C、a hazard to southern Chile and Argentina
D、the source of UV radiation

答案B

解析 本题是推论题。参见文中最后一段。这段中提到,大气层臭氧的减少使得紫外线强度增高,对人类形成更多的危险。由此可推论南极上空大气层臭氧出现的空洞对人类健康是一种危险。
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