About l 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.

【职称英语考试阅读的判断试题练习(十二)】相关文章：

★ 职称英语常考语法解析之状语从句

★ 职称英语卫生类考试考前每日一练(1)

★ 2015年全国职称英语考试重点语法备考辅导:不定代词的数(2)

★ 职称英语考试阅读判断试题的练习(八)

★ 2015年职称英语考试综合辅导词汇记忆技巧(2)

★ 职称英语考试阅读判断试题的练习(六)

★ 2015年职称英语考试基础复习攻略之词汇选项

★ 2015年职称英语备考高频词汇730个(3)

★ 职称英语的考试阅读判断试题练习(十一)

★ 职称英语卫生类阅读高概率文章2