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题目材料：
Sunscreen works through a combination of organic and inorganic chemicals that help block or absorb UV-B rays. UV-B rays cause sunburn and other sun-related skin damage. SPF, or Sun Protection Factor, is the gauge of how well sunscreen will protect the skin from UV-B rays. Thus, those who use sunscreen with a higher SPF will suffer fewer sunburns and sun-related skin issues. It is important to use a sunscreen with a high SPF because, over time, sun damage can cause significant problems for the skin.
In the information provided, the two portions in boldface play which of the following roles?
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A.The first provides support for an intermediate conclusion of the passage; the second states that intermediate conclusion.
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B.The first serves to prove the argument against the main idea; the second shows why this argument is invalid.
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C.The first states an intermediate conclusion of the passage; the second supports that intermediate conclusion.
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D.The first gives an example of the main idea; the second refutes the evidence provided to support the main idea.
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E.The first states the main idea of the passage; the second states the intermediate idea of the passage.
A显示答案
