2017高考英语北师大版一轮复习Unit 17夯实训练含答案
高考题型提能练(十七) Unit 17
(2016·四川绵阳市高三二诊考试)Many teachers believe that hands-on experience is the __1__(good) way to learn.
A group of students in the United States are putting that belief to the test. They __2__ (success)
designed
and
built
a
robot
for
discovering unexplored mines __3__
the bottom of the sea. Students made the robot __4__(answer)
a challenge from the U.S. Department of Defense.
The students recently tested the underwater vehicle __5__(call) PerseusⅡ in a 95-meter-long tank of water at the Stevens Institute of Technology.
The robot costs about $15,000 to build. The students use a video game control to direct __6__(it) movements in the tank.
What’s more,devices known as Japters __7__ (able) the robot to go up,down and toward its target in the water. Video cameras on the robot send images back to a computer through a 13-meter-long cable.
Perseus Ⅱ also has __8__ set of lasers (激光),which are used to measure the size of an object.
The robot is the creation of five undergraduate students. For over six months,they worked up __9__ 20 hours a week to design and build Perseus Ⅱ.
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