2. 外语
  3. Ellen was pleased to hear people praise her great tan skin. The third type of skin cancer called melanoma is often caused by __

Ellen was pleased to hear people praise her great tan skin. The third type of skin cancer called melanoma is often caused by __

admin2009-04-23  102
问题 Ellen was pleased to hear people praise her great tan skin.
The third type of skin cancer called melanoma is often caused by ______.
选项
答案too much exposure to the sun
解析 文章第十二段第一、二句话指出"The third type of skin cancer is called melanoma．Melanoma is often caused by too much exposure to the sun…"第三种类型的皮肤癌被称作“黑瘤”，它的产生是由于过多的日晒引起的，由此可知此处该填too much exposure to the sun。
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大学英语四级

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