第6题: [单项选择]结核病最重要的社会传染源类型是() A. 原发性肺结核 B. 浸润型肺结核 C. 急性粟粒型肺结核 D. 慢性血行播散型肺结核 E. 慢性纤维空洞型肺结核 参考答案:E
第7题: [单项选择]Why does the author put "neutron star" in quotation marks A. It is a special term of astronomy. B. It is an invented term. C. He is quoting an authority. D. He is using the term ironically. 参考答案:A