malaria.

　　Over one million people worldwide die from these diseases each year. New research now

　　shows how mosquitoes choose who to bite.

　　Mosquitoes need blood to survive. They are attracted to human skin and breath. They smell the carbon dioxide gas，which all mammals breathe out. This gas is the main way for mosquitoes to know that a warm-blooded creature is nearby.

　　But mosquitoes also use their eyes and sense of touch. Michael Dickinson is a professor at the California Institute of Technology. His research shows how these small insects，with even smaller brains，use three senses to find a blood meal.

　　Michael Dickinson’s team used plumes—a material that rises into the air of carbon dioxide gas into a wind tunnel. They then used cameras to record the mosquitoes. The insects followed the plume.

　　Then，the scientists placed dark objects on the lighter colored floor and walls of the tunnel. Mr Dickinson said，at first，the mosquitoes showed no interest in the objects at all.

　　“What was quite striking and quite surprising is that the mosquitoes fly back and forth for hours. These are hungry females and they completely ignore the objects on the floor and wall of the tunnel. But the moment they get a hit of CO2，they change their behavior quite obviously and now would become attracted to these little visual blobs (斑点）.”

【2016年高考英语二轮复习专题讲练测：（测）专题04 阅读理解Ⅱ：细节理解题（原卷版）】相关文章：

★ 2017届高考英语二轮复习大题冲关秘籍语法填空：考纲解读（含解析）

★ 2017届高考英语二轮复习课时训练：20（含解析）

★ 湖南省长沙县实验中学2016届高三英语二轮复习书面表达复习重点话题指导专题08 健康饮食话题指导（学生版）

★ 2016年高考英语二轮复习专题讲练测：（讲）专题04 阅读理解Ⅱ：细节理解题（原卷版）

★ 2016年高考英语第二轮复习策略与技巧

★ 2016年高考英语二轮复习专题讲练测：（练）专题04 阅读理解Ⅱ：细节理解题（原卷版）

★ 2014届高考英语一轮复习必修1参考答案（外研版）

★ 2014届高考英语一轮复习选修7参考答案（外研版）

★ 湖南省长沙县实验中学2016届高三英语二轮复习书面表达复习重点话题指导专题09 科技发明话题指导（学生版）

★ 2017届高考英语二轮复习大题冲关秘籍语法填空：体验真题（含解析）