While brief oral exposure disrupted intestinal iron transport，long­time exposure caused intestinal cells to be larger and broader，thus allowing iron to enter the bloodstream much faster.“The intestinal cells are a gateway that ingested nanoparticles must go through to get to the body，”said Mahler.“We monitored iron absorption and found that the polystyrene nanoparticles affected the absorption process and caused a physiological response.”

　　5．What is the best title for the passage?

　　A．Nanoparticles are common in our life.

　　B．Nanoparticles have an effect on our health.

　　C．We should know more about nanoparticles.

　　D．The intake of nanoparticles should be banned.

　　6．Gretchen Mahler's research is to ______.

　　A．measure the direct health effects of iron uptake

　　B．find out the effect of long­time exposure to nanoparticles

　　C．explore how to reduce the effects of nanoparticles

　　D．study how nanoparticles affect chickens

　　7．The underlined word “disrupted” in the last paragraph probably means “______”．

　　A．disorderedB．benefited

　　C．discovered

　　D．followed

　　8．In which part of a magazine can this passage most likely be found?

　　A．Science.

【2016年陕西省高考英语二轮复习专题训练卷十六：史地、自然、科普、资讯类阅读理解、信息匹配（一）】相关文章：

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