КР Англ. яз. 1й курс, текст GPS
.docxМинистерство образования республики Беларусь
Учреждение образования
«БЕЛОРУССКИЙ ГОСУДАРСТВЕННЫЙ УНИВЕРСИТЕТ ИНФОРМАТИКИ И РАДИОЭЛЕКТРОНИКИ»
Институт информационных технологий
Специальность_________________________________
КОНТРОЛЬНАЯ РАБОТА
По курсу_____________________________________
Вариант №_____
Студент-заочник___ курса
Группы №______________
ФИО __________________
_______________________
Адрес__________________
_______________________
Тел. ___________________
Минск, 2010
Вариант 4.
Задание 1. Выберите правильную форму глагола из двух предложенных.
-
You haven’t said a word all morning. What … about?
B. do you think
-
Turn the lights off before you … to bed.
A. will go
-
It is clear to me that his time for action … .
A. has come
-
She … home when she saw the accident.
A. was walking
-
How long ago … this course?
B. did you take
-
David dreams that he will become a succsessful lawyer by the time he … thirty years old.
B. will be
Задание 2. Подчеркните сказуемое в предложении, определите его видо-временную форму и переведите предложения на русский язык.
1. GPS is used by aircraft and ships for en route navigation and for airport or harbor approaches. (Present Passive)
GPS используется в самолетах и короблях для маршрутной навигации при приближении к аэропорту или гавани.
2. Because the GPS user does not need to communicate with the satellite, GPS can serve an unlimited number of users.( Present Indefinite)
Поскольку GPS пользователю нет необходимости общаться со спутником, GPS может использовать неограниченное число пользователей.
3. GPS, formally known as the Navstar Global Positioning System, was initiated in
1973.(Past Passive)
GPS, официально известная как система глобального позиционирования Navstar, начала свое функционирование в 1973 году
Задание 3. Укажите, какой частью речи является выделенная форма:
а) герундием (Gerund); b) инфинитивом(Infinitive); с) причастием настоящего времени (Participle I); d) причастием прошедшего времени (Participle II). Переведите предложения.
1. Global Positioning System (GPS) is a space-based radio-navigation system, consisting of 24 satellites and ground support. (Participle II), (Participle I)
Система глобального позиционирования-расположенная в космосе радио-навигационная система, состоящая из 24 спутников и поддержки с земли.
2. By taking a measurement from a fourth satellite, the receiver avoids the need for an atomic clock. (Gerund)
При получении измерения от четвертого спутника, ресивер позволяет избежать необходимости атомных часов.
3. In a method called precision farming, GPS is used to monitor and control the application of agricultural fertilizer and pesticides. (Participle II)
В методе, называемом точным земледелием, GPS используется для наблюдения и контроля за применением сельско-хозяйственных удорений и пестицидов.
Задание 4. Read the text. Then read the titles. Which of the following titles is the best?
b. Global Positioning System.
Global Positioning System (GPS) is a space-based radio-navigation system, consisting of 24 satellites and ground support. GPS provides users with accurate information about their position and velocity, as well as the time, anywhere in the world and in all weather conditions.
GPS, formally known as the Navstar Global Positioning System, was initiated in 1973. 1____. GPS satellites carry atomic clocks that provide extremely accurate time. The time information is placed in the codes broadcast by the satellite so that a receiver can continuously determine the time the signal was broadcast. The signal contains data that a receiver uses to compute the locations of the satellites and to make other adjustments needed for accurate positioning. The receiver uses the time difference between the time of signal reception and the broadcast time to compute the distance, or range, from the receiver to the satellite. The receiver must account for propagation delays, or decreases in the signals speed caused by the ionosphere and the troposphere. With information about the ranges to three satellites and the location of the satellite when the signal was sent, the receiver can compute its own three-diinensional position.
An atomic clock, synchronized to GPS is required in order to compute ranges from these three signals. However, by taking а measurement front a fourth satellite, the receiver avoids the need for an atomic clock. 2____. GPS composes three segments: the space, control, and user segments. Тhе space segment includes the satellites and the Delta rockets. GPS satellites fly in circular orbits at an amplitude of 20,100 km (12,500 mi) and with a period of 12 hours. The orbns are tilted to the earth's equator by 55 degrees to ensure coverage of polar regions.3____. Each satellite contains four atomic clocks.
The control segment includes the master control stations in Colorada, and monitor stations in the Atlantic, Indian and South Pacific Oceans. These stations monitor the GPS satellites. Тhе control segment uses measurements collected by the monitor stations to predict the behavior of each satellite’s orbit and clock. The prediction data is upilinked, or transmitted, to the satellites for transmission to the users. 4____.
The user segment includes the equipment of the military personnel and civilians who receive GPS signals. With more than 500,000 GPS reciviers, the civilian community has its own large and diverse user segment. Surveyors use GPS to save time over standard survey metbods. 5____. GPS tracking systems are used to route and monitor delivery vans and emergency vehicles. In a method called precision farming, GPS is used to monitor and control the application of agricultural fertilizer and pesticides. GPS is available as an in-car navigation aid and is used by hikers and hunters. It is also used on the Space Shuttle. Because the GPS user does not need to commtmicate with the satellite, GPS can serve an unlimited number of users.
Задание 5. Read the text again. Choose the best sentence from the list below to complite each gap.
---------1. We know that the atom is mostly empty space with a minute central nucleus some tens of thousands of times smaller then the atom.
1____ 2. Powered by solar cells, the satellites continuously orient themselves to point their solar panels toward the sun and their antennae toward the earth.
5____ 3. GPS is used by aircraft and ships for route navigation and for airport or harbor approaches.
2____ 4. GPS determines location by computing the difference between the time that a signal is sent and the time it is received.
---------5. That makes it possible to send signals long distances, and in the XX centuary the world was united without wires.
3____ 6. Thus, the receiver uses four sattelites to compute latitude, longitude, altitude, and time.
4____ 7. The control segment also ensures that the GPS satellites orbits and clocks remains within acceptable limits.
Задание 6. Chose the best answer to these questions according to the text.
1. What are the constituent parts of Global Positing System?
c) 24 satellites and ground support,
2. When was GPS initiated?
a) in 1973,
3. Wbat is the way to avoid the need for an atomic clock?
b) to take a measurement from a fourth satellite,
4. Why are the orbits of GPS satellites tilted to the earth’s equator?
c) to ensure coverage of polar regions.
5. What segment is necessary to predict the behavior of each satellite’s orbit and clock?
b) the control segment.
Задание 7. Here are some dictonary definitions of words from the text. Each word has more than one definition. Chose the definition that fits each of the worth in the text best
1. time
b. occasion.
2. receiver
b. part of an apparatus for receiving staff,
3. segment
b. division or section.
4. control
a. power or authority to direct, order or restrain;
Задание 8. Find words and expressions which mean the same as the following.
1. backing
ground support
master control stations
2. guarantee
accurate information
to ensure coverage of polar regions
3. have or hold within itself
GPS composes three segments
solar panels
antennae
4. staff
receiver
latitude, longitude, altitude, and time
5. unbounded
atomic clock
sun
time
Задание 9. Make an outline of the text in 7-8 sentences.
Global Positioning System is one of the greatest human inventions. It uses a lot of technologies to provide the service of tracking position of anything and anywhere. But GPS can’t exist in space without human control at Earth. GPS composes three segments which helps it work. Owing to the fact that GPS is used solar panels – it will fly across the space while the sun is shining. And now any of the civilian community who wishes to use the GPS can use it when he wants, not only military forces. GPS will serve mankind many years.