单选题
阅读下面这篇短文，短文后列出了7个句子，请根据短文的内容对每个句子作出判断。如果该句提供的是正确信息，请选择A项：如果该句提供的错误信息，请选择B项：如果该句的信息文章中没有提及，请选择C项。
{{B}} Tanning Parlors Take Heat{{/B}}
People who seek a glamorous tan through sun lamps may double their risk of developing Common types of skin cancer, according to a new study that found the risk was highest for those who start at a young age.
The study, appearing in the latest issue of Journal of the US National Cancer Institute, concluded that people who use tanning devices were 1.5 to 2.5 times more likely to have common kinds of skin cancer than were people who did not use the devices. The study confirmed what doctors have long suspected-that sun lamp use increases the risk of basal cell and squamous cell skin cancers, said Margaret R. Karagas, first author of the study.
Either going to the tanning parlor, or getting an infrequent sunburn can seriously damage the skin, said Dr. James Spencer, vice chairman of the department of dermatology at Mount Hospital, but the small day-to-day exposure is worse for the skin in the long run.
Joseph A. Levy, vice president of the International Smart Tan Network, however, said occasional sunburn "is a risk factor in all forms of skin cancer and intermittent sunburn is what the tanning industry is trying to stop. '
In the study, Karagas and her colleagues interviewed 603 basal cell skin cancer patients and 293 with squamous cell skin cancer. They talked to 540 control subjects who did not have either type of skin cancer.
About 1 million Americans are diagnosed annually with skin cancer. Among those skin cancer patients, about 80 percent are with basal cell skin cancer, 16 percent, with squamous cell skin cancer and 4 percent with melanoma-the most serious form of skin cancers. Back to the interviewed patients, 190 reported that they had used tanning devices at some time. In the control groups, only 75 had used such devices. Karagas said a statistical analysis shows that those who used tanning equipment were 2.5 times more likely to get squamous cell skin cancer than those who had not used the devices. For basal cell cancer, the risk was 1.5 times greater.
The risk was highest for those who first used the tanning devices before the age of 20, said Karagas. For this group, the squamous cell cancer risk was 3.6 times greater than that of the controls while the basal cell cancer risk was 1.3 times greater.
单选题 The passage confirms that using tanning equipment is harmful to one's health.
【正确答案】 A
【答案解析】[解析] 通篇文章都在叙述使用tanning equipment与皮肤癌的关系，结论是二者有关联。
单选题 The highest rate of skin cancers is found in teenagers who use sun lamps frequently.
【正确答案】 B
【答案解析】[解析] 最后一段只是说，最初使用sun lamps的年龄低于20岁的年轻人后来得皮肤癌的概率最高，但并没有说得皮肤癌患者中青少年(teenagers)的比率最高。所以本题给出的信息不正确。
单选题 Melanoma is a more serious cancer than lung cancer.
【正确答案】 C
【答案解析】[解析] 文章没有对皮肤癌和肺癌进行过比较，而且，lung cancer在通篇文章中没有出现过。
单选题 Karagas reported her research results basing on interviews with a group of skin cancer patients and a control group of people with no skin cancers.
【正确答案】 A
【答案解析】[解析] 本题给出的信息是正确的。根据见第六段。
单选题 Doctor James Spencer's argument implies that in the long run, getting all infrequent sunburn is worse than the small day-to-day exposure.
【正确答案】 B
【答案解析】[解析] 第四段谈到了Either going to the tanning parlor，or getting an infrequent sunburn这两点，并对这两点进行了比较。Dr．Spencer说的是“small day-to-day exposure”最终带来的伤害比“getting an infrequent sunburn”更大。本题给出的是相反的信息。
单选题 The passage mentions three forms of skin cancers, of which squamous cell skin cancer is the most dangerous.
【正确答案】 B
【答案解析】[解析] 倒数第二段的第二句说到这三类皮肤癌，其中，黑素瘤皮肤癌是危险性量大的皮肤癌。所以，说冠状细胞皮肤癌是三类皮肤癌中最严重的皮肤痛是错误的。
单选题 It is implied in Mr. Levy's argument(Paragraph 5) that frequent exposure to sun lamps is safe.
【正确答案】 A
【答案解析】[解析] 第五段转述了Levy先生的观点。他说，既然gettinganinfrequent sunburn有危险性，那么the tanning industry(人工日照行业)就是要纠正这种intermittent sunbum的现象。所以，本题给出的信息是正确的。