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Many teachers believe that the
hands-on experience is the {#blank#}1{#/blank#} (good) way to learn. A group of students in
the United States are putting that belief to the test. They {#blank#}2{#/blank#} (success) designed and built a robot for
discovering unexplored mines {#blank#}3{#/blank#} the bottom of the sea. Students made the robot
{#blank#}4{#/blank#}(answer) a challenge from the US
Department of Defense.
The students recently tested the
underwater vehicle {#blank#}5{#/blank#}(call) PerseusⅡ in a 95-metre-long
tank of water at the Stevens Institute of Technology.
The robot costs about $15,000 to
build. The students use a video game controller to direct 4{#blank#}6{#/blank#}(it) movements in
the tank. What's more, devices known as Japters {#blank#}7{#/blank#} (able) the robot to go up, down and towards
its target in the water. Video cameras on the robot send images back to a computer
through a 13-metre-long cable. Perseus Ⅱ,{#blank#}8{#/blank#}the students worked up to 20
hours a week to design and build, also has {#blank#}9{#/blank#} set of lasers, which are used to measure the
size of an object.
DeLorme supervised the project
from {#blank#}10{#/blank#}(begin) to end. He said the
specialized requirements of robots were demanding.