第二节 七选五
The past three decades have seen great progress in our knowledge of dealing with travel dangers.__16__There has not been much effort to solve the old problem and change the way people behave in the sun.
We understand the harmful effects of strong sunlight.As with cigarettes and lung cancer,there's no need for more research to tell us what we should do.Nor is much research being carried out.__17__
Last month,a fivemonthold baby almost died from sunburn—suffering burns to 40 percent of its skin surface while sleeping on the beach.
__18__In men,the death rate for malignant melanoma(恶性皮肤瘤),the deadliest form of skin cancer,has more than doubled in the past 30 years — from 1.5 per 100,000 population to 3.1 per 100,000,according to Cancer Research UK.It is no coincidence(巧合)that the same 30year period has seen a rise in travelling.In older age groups,the death rate is much higher.Meanwhile,the number of new cases of melanoma has grown fivefold.More women are being diagnosed with melanoma but more men are dying from it—men are less likely to seek treatment in time.__19__
The basic reason comes down to this:most paleskinned people have a strong belief,deeply rooted in our culture,that they look better with browner skin.__20__
A.Other more treatable skin cancers are also on the rise,with an estimated 100,000 cases every year
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