D. It is not effective enough and could be poisonous.

　　65. Which word can be used to complete the following process of changes?

　　⇨⇨⇨

　　A. protected

　　B. formed

　　C. exposed

　　D. combined

　　【要点综述】这是一篇科技文。怎样使用胶囊？如何让吃药更加安全、疗效更好？文章对此做了介绍。

　　63. B　信息理解题。根据第一段最后一句“Now, researchers in California have designed what could be a harmless trigger to date: shining near­infrared light (NIR，近红外线) on the drug in the capsule.”可知答案。

　　64. D　推理判断题。根据第三段最后两句“…ONB groups fall off the polymer, leading to its breakdown.”和“…and it could be poisonous to cells…”可知答案。

　　65. C　信息理解题。根据最后一段第五句“When the Bhcs absorb NIR light, the reactive groups are exposed and break the long polymer into two short chains.”可知此处用exposed，即C项正确。Two friends have an argument that breaks up their friendship forever, even though neither one can remember how the whole thing got started. Such sad events happen over and over in high schools across the country. In fact, according to an official report on youth violence, “In our country today, the greatest threat to the lives of children and adolescents is not disease or starvation or abandonment, but the terrible reality of violence”. Given that this is the case, why aren’t students taught to manage conflict the way they are taught to solve math problems, drive cars, or stay physically fit?

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