A. In every gab write a word, derived from the one given in brackets.
Model: Domestic robotic (robot) cleaners (clean) contain a lot of sensors.
B. Make up different types of questions for each paragraph. If you have some difficulties use the grammar reference at the end of the book or the Internet sites:
https://www.e-grammar.org
http://www.grammarbank.com/question-types.html
Exercise 18. Try to enrich your vocabulary:
A. Find in the text the words which have similar meanings to the following words:
home (adj.)
to travel around
successfully
size
to establish
to bump into smth.
to mirror
to come back
to push in
to maneuver around
to grow
unexpected
blow
B. Find in the text the words which have the opposite meaning to the following words:
dirty
initially
upwards
to decrease
to pull out
raise
to receive
to prevent smb./smth. from doing smth.
C. Find the words of the same root in the text:
to sense -
container -
safe -
to receive -
process -
calculator -
to direct -
objective -
to bump -
final -
to domesticate -
pressure -
detection -
to vibrate -
Exercise 19. Match each word with its correct definition.
Vacuum, surface, sensor, infrared signal, to reflect, processor, cliff, to reverse, acoustic, vibration.
1. electromagnetic radiation with wavelengths longer than visible light but shorter than radio waves;
2. a high rock with a very steep side;
3. to prevent passage and cast back;
4. the flat top part of some object;
5. a space entirely devoid of matter;
6. to change the direction to its opposite;
7. related to the sense or organs of hearing and to sound;
8. periodic motion, slight shaking movement;
9. an integrated electronic circuit performing calculations in a computer;
10. a device detecting and responding to some input from the physical environment.
Exercise 20. In pairs or small groups discuss the questions:
1. How many different types of sensors does the vacuum cleaner have?
2. What are the functions of the processor?
3. How can the robot reverse away from sudden drops?
4. How does the robot “understand” that the area is clean?
5. How does the robot sense the obstacles such as furniture?
6. How does the robot calculate the dimensions of the room?
7. Why is one of the sensors called “mechanical”?
8. Why is another sensor called “acoustic”?
9. How will switch off a robot like this?
10. How will this robot be re-charged?
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Exercise 21.
A. Fill in the gaps with appropriate words:
1. The cleaner raises dirt from the carpet and it _____________the acoustic sensors.
2. The vibrations of the metal plates pass ___________________ to the processor.
3. The cleaner goes round objects and doesn’t _________________ them.
4. The domestic robotic vacuum cleaner contains ______________ ___________.
5. The size of the room is determined with the help of ______________.
6. The robot can fall down ______________, but the “cliff” sensors cause it to _____________ away.
7. The infrared receiver calculates the speed of the returned _____________.
8. The bumper goes right round the ______________.
9. The cleaner avoids the objects by changing _______________.
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