D．dream

　　27．A.ignore

　　B．forget

　　C．leave

　　D．hide

　　Ⅲ.阅读理解

　　MIT researchers and their colleagues are working to find out whether energy from trees can power a network of sensors (传感器) to prevent spreading forest fires.

　　What they learn could also raise the possibility of using trees as silent guards along the nation’s borders to discover potential threats such as smuggled (走私的) radioactive materials.

　　The U．S. Forest Service currently predicts and tracks fires with a variety of tools, including remote automatic weather stations. But these stations are expensive and sparsely (稀疏地) distributed. Additional sensors could save trees by providing better local climate data to be used in fire prediction models and earlier warnings. However, recharging or replacing batteries by hand at very hard－to－reach locations makes it impractical and costly.

　　The new sensor system seeks to avoid this problem by developing trees into a self－sustaining power supply. Each sensor is equipped with a battery that can be

　　slowly recharged using electricity produced by the tree. “A single tree doesn’t generate a lot of power, but over time the trickle (细流) charge adds up, just like ________” said Shuguang Zhang, one of the researchers on the project and the associate director of the MIT’s Center for Biomedical Engineering (CBE)．

【2017届高考英语一轮复习课时作业9：Unit 3《Back to the past》（牛津译林版必修3湖南专用）】相关文章：

★ 2017届高考英语二轮复习大题冲关秘籍短文改错：名校模拟（含解析）

★ 【浙江专用】2014届高考英语一轮复习课时作业(一)必修1Unit 1《Friendship》

★ 2014届高考英语一轮复习课时作业(七)必修2Module 1《Our Body and Healthy Habits》（外研版）

★ 四川省2016届高考英语一轮复习课时作业（29） Module 5 The Great Sports Personality 外研版必修5

★ 【北京专用】2014届高考英语一轮复习方案课时作业：选修8 Unit 2 Cloning

★ 【北师大版】2014届高考英语一轮复习指导课时作业：Unit 6 B卷 Word版含解析

★ 2017届江苏省淮安市新马中学高考牛津译林版英语一轮复习活动单：模块8 Unit 3《The world of colours and light》

★ 2017届高考英语二轮复习书面表达限时测验：7（含解析）

★ 2014届高考英语一轮复习课时作业(三)必修1Module 3《My First Ride on a Train》（外研版）

★ 2014年牛津译林版高中英语总复习（第1轮）同步练习 M3《Unit 3　Back to the past》Word版含解析