单选题
Dangerous Sunshine to Children

Two United Nations agencies warned on Tuesday that children are most at risk of developing skin cancers as a result of the long-term decline in the earth"s protective ozone layer. The agencies, the World Health Organization (WHO) and the UN Environmental Programme (UNEP), issued the warning as they launched a global programme aimed at alerting schools to the dangers of exposure to the sun.
"As ozone depletion becomes more marked, and as people around the world engage more in sun seeking behaviour, the risk of health complications from over-exposure to ultraviolet radiation is becoming a substantial public health concern," said WHO Directorgenera Lee Jong-wook. By reducing the time children and adolescents are exposed to direct sunlight, he said. "We can substantially reduce the risk of contracting skin cancers, cataracts and other conditions which might only appear much later in life."
In its 2002 World Health Report, the WHO said around the world an average of 66,000 people died every year from melanoma or other types of skin cancer. Independent scientific research shows that every year there are between two to three million new cases of non-malignant melanoma and around 130,000 malignant—and normally fatal—new full blown skin cancer cases.
Although most known skin cancers seemed to occur in the industrialized world, WHO radiation and environmental health specialist Mike Repacholi told a news conference, there were many cases believed to be unreported in poorer countries. Although people with darker skins were less susceptible to skin cancers, they were just as likely to contract eye cataracts as fairer-skinned populations, and people living close to the equator were even more likely to develop them.
As for the protection method, the WHO said that under the school plan, dubbed the Inter Sun Project, the two agencies will distribute packages showing teachers how to develop their own sun education programmes, the WHO said. In a joint statement from the two agencies which also marked the International Day for the Preservation of the Ozone Layer, UNEP Executive Director Klaus Toepfer said latest studies showed the protective shield was on the road to recovery. This was the result of international agreements over the past two decades to phase out use of various chemicals—like those used in some pesticides, refrigerators and aerosols.
"But we must remain vigilant and more needs to be done before we can say that the problem is solved for good," said Toepfer. This included stopping illegal trade in banned chemicals and enforcing the agreements in developing countries. "Only then can we say that the sky above our heads will be safe for our children and their children to come," the former German environment minister said.
单选题 Why does the risk of developing skin cancers in children become greater and greater?
【正确答案】 C
【答案解析】[解析] 答案参见第一段第一句:由于地球起保护作用的臭氧层一直缩小,因此儿童发生皮肤癌的危险性增大。
单选题 How many people die from skin cancers including melanoma all over the world every year?
【正确答案】 A
【答案解析】[解析] 答案参见第三段第一句:WHO在2002年的《世界健康状况报告》中提到,全世界每年平均有66000人死于黑素瘤及其他类型的皮肤癌。
单选题 What people are more likely to develop eye cataracts?
【正确答案】 C
【答案解析】[解析] 答案参见第四段最后一句:住在赤道附近的人更容易患白内障,并没有提到南极、北极。至于肤色,该句说到,白人、黑人患白内障的可能性是相等的。
单选题 All of the following articles may use some chemicals unfavorable for the preservation of the ozone layer EXCEPT ______.
【正确答案】 D
【答案解析】[解析] 第五段最后一句举例说明某些杀虫剂、电冰箱及烟雾剂可能使用一些对臭氧层有害的化学物质,并没有提到供内服的药品。
单选题 The phrase "for good" in the last paragraph can be best replaced by ______.
【正确答案】 A
【答案解析】[解析] 短语for good或for good and all表示“永久地”、“决定性地”,英文释义为“permanently”,“finally”,“forever”,故正确答案为A。