【考点】科技问—说明文
【文章大意】。本文是一篇科技文,围绕“怎样使用胶囊,让吃药更加安全、疗效好”这个主题展开研究。
63.【答案】B
【试题解析】细节理解题。根据第一段最后一句“Now, researchers in California have designed what could be a harmless trigger to date: shining near-infrared light on the drug in the capsule.”可知,应选B项。
【难度】一般
64.【答案】D
【试题解析】推理判断题。根据第三段最后两句中“…ONB groups fall off the polymer, leading to its breakdown”和“…and it could be poisonous to cells…”可知,应选D项。
【难度】较难
65.【答案】C
【试题解析】细节理解题。根据最后一段第五句中“When the Bhcs absorb NIR light, the reactive groups are exposed…”可知此处用exposed,即C项正确。
【难度】一般
【长难句解析】
Researchers around the globe have developed polymers (聚合物) and other materials that begin to break down when they absorb cither ultraviolet (UV,紫外线) or visible light.
本句是polymers (聚合物) and other materials的定语从句, when 引导的时间状语从句。
This one consists of a long chain of compounds called cresol groups linked in a polymer. Cresol contains reactive(易反应的) components that make it highly unstable in its polymeric form, a feature
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