練習(xí):
1. Why does the risk of developing skin cancers in children become greater and greater?
A Because they pay little attention to their skin health.
B Because they are short of physical training.
C Because the earth’s protective ozone layer declines year after year.
D Because the earth is getting warmer and warmer.
2. How many people die from skin cancers including melanoma all over the world every year?
A An average of 66,000.
B Approximately 130,000.
C About 196,000.
D Between 2,000,000 to 3,000,000.
3. What people are more likely to develop eye cataracts?
A Fairer-skinned people.
B Darker-skinned people.
C People living near the equator.
D People living near the poles.
4. All of the following articles may use some chemicals unfavorable for the preservation of the ozone layer EXCEPT______.
A aerosols
B refrigerators
C pesticides
D medicines
5. The phrase “for good” in the last paragraph can be best replaced by______.
A permanently
B correctly
C largely
D well
答案與題解：
1．C 文章第一句就說到，由于地球起保護(hù)作用的臭氧層一直縮小，因此兒童發(fā)生皮膚癌的危險(xiǎn)性增大，故C項(xiàng)應(yīng)是答案。
2．A 第三段第一句說，WHO在2002年的世界健康狀況報(bào)告中提到，全世界每年平均有S6， 000人死于黑素瘤及其他類型的皮膚癌，故A項(xiàng)是正確答案。
3．C 第四段最后一句說到，住在赤道附近的人更容易患白內(nèi)障，并沒有提到南極、北極。至于膚色，該句說到，白人、黑人患白內(nèi)障的可能性是相等的。
4．D 第五段最后一句舉例說明某些殺蟲劑、電冰箱及煙霧劑可能使用一些對臭氧層有害的化學(xué)物質(zhì)，并沒有提到供內(nèi)服的藥品，而且根據(jù)推理，也應(yīng)將其排除在外。
5．A 短語for good或for good and all的意思是“永久地”、“決定性地”；英英詞典的釋義為“permanently”、“finally”、“forever”，故其他選項(xiàng)均不確切。
1. Why does the risk of developing skin cancers in children become greater and greater?
A Because they pay little attention to their skin health.
B Because they are short of physical training.
C Because the earth’s protective ozone layer declines year after year.
D Because the earth is getting warmer and warmer.
2. How many people die from skin cancers including melanoma all over the world every year?
A An average of 66,000.
B Approximately 130,000.
C About 196,000.
D Between 2,000,000 to 3,000,000.
3. What people are more likely to develop eye cataracts?
A Fairer-skinned people.
B Darker-skinned people.
C People living near the equator.
D People living near the poles.
4. All of the following articles may use some chemicals unfavorable for the preservation of the ozone layer EXCEPT______.
A aerosols
B refrigerators
C pesticides
D medicines
5. The phrase “for good” in the last paragraph can be best replaced by______.
A permanently
B correctly
C largely
D well
答案與題解：
1．C 文章第一句就說到，由于地球起保護(hù)作用的臭氧層一直縮小，因此兒童發(fā)生皮膚癌的危險(xiǎn)性增大，故C項(xiàng)應(yīng)是答案。
2．A 第三段第一句說，WHO在2002年的世界健康狀況報(bào)告中提到，全世界每年平均有S6， 000人死于黑素瘤及其他類型的皮膚癌，故A項(xiàng)是正確答案。
3．C 第四段最后一句說到，住在赤道附近的人更容易患白內(nèi)障，并沒有提到南極、北極。至于膚色，該句說到，白人、黑人患白內(nèi)障的可能性是相等的。
4．D 第五段最后一句舉例說明某些殺蟲劑、電冰箱及煙霧劑可能使用一些對臭氧層有害的化學(xué)物質(zhì)，并沒有提到供內(nèi)服的藥品，而且根據(jù)推理，也應(yīng)將其排除在外。
5．A 短語for good或for good and all的意思是“永久地”、“決定性地”；英英詞典的釋義為“permanently”、“finally”、“forever”，故其他選項(xiàng)均不確切。