There are robots all around us. Some do very____1____jobs like
flying airplanes and driving subway trains. And some do simple jobs.
When an automatic washing machine____2____, water goes in. The
machine waits until the water is hot____3____washing the clothes. It does this
by "feedback(反馈)". Information about what's
happening is "fed back" into the robot to tell it____4____next.
Our eyes, ears and other senses(感官) are our
feedback. They tell us____5____around us. So robots are like people
in____6____ways. They work and they have feedback.
But____7____robots look like people. Many are hidden away. Robots
control (控制) the temperature of our houses, our
cookers, our hot water systems. We can set the controls to the temperature we
want. The robot does____8____. Its feedback usually come from a thermostat(自动调温器).
One kind of thermostat is a strip of metal, which bends when it gets
hot. At the right temperature, it bends just enough____9____a switch. This
turns off the heat. As the air around it gets____10____, the metal gets
straight, and this turns the heat on again.
( ) 1. A. easy B. simple C. different D. difficult
( ) 2. A. is switched on B. is switched C. is switching D. switches
on
( ) 3. A. after B. before C. as soon as D. while
( ) 4. A. how to do B. what to do C. what to do it D. to do what
( ) 5. A. what will happen B. what's happening
C. to happen what D. something will happen
( ) 6. A. some B. any C. two D. three
( ) 7. A. many B. a lot of C. very few D. a little
( ) 8. A. something B. something other things
C. half the work D. the rest
( ) 9. A. to work B. working C. to working D. works
( ) 10. A. cold B. hot C. cool D. warm