Bài 2: Input/output device
Mục tiêu của bài:
Sau khi học xong bài này người
học có khả năng:
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Hiểu được các từ
vựng dùng để chỉ các thiết bị nhập xuất
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Đọc hiểu các tài
liệu nói về thiết bị nhập xuất
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Mô tả các thiết bị
nhập xuất bằng tiếng anh.
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Sử dụng thành thạo
cấu trúc Used to + Inf / Used for + V-ing
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Tự tin khi đọc tài
liệu hay phát âm thiết bị nhập xuất bằng Anh ngữ.
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III. Reading
A. Work with a partner. Discuss these questions
1. How is
the mouse connected to the computer?
2. What does
the mouse pointer look like on the screen?
3. What are
the functions of the mouse buttons?
4. What are the advantages of a computer mouse over a keyboard?
B. Read the following text.
Input
devices
Input involves entering data into the system for
processing. The data is taken from the environment and changed into a suitable
form to be processed. There are many types of input devices used for different
purposes. The two most common input devices are the keyboard and the mouse.
THE
KEYBOARD
A computer keyboard looks similar to a typewriter, with a number of
extra keys for special purposes. Data is entered when one or more keys are
pressed to represent a character or special function. If a key representing a
character is pressed, the character appears where the blinking rectangle, or cursor, is on the screen. The cursor
indicates the user's current position on the screen.
The
keyboard is the main device that you use to communicate with your computer.
Some of
the special keys include:
Enter or
Return:
-
used to inform the computer to
act on an instruction (command) or to move the cursor to a new line.
- allows
you to stop the execution of a command.
- used in
combination with other keys to perform special tasks.
- used in a
similar way to the control key (not found on all keyboards).
THE MOUSE
A mouse is a pointing device that can be used to point the cursor at the
desired position on the screen. It enables the user to move the cursor to
different parts of the screen very quickly. A button on the mouse allows the user to select a
character or command from the screen display.
Other
common input devices include the light pen, joystick, scanner, touch screen and
trackball.
Task 1: Write down whether the following statements
are true or false.
1. The mouse
does not allow the user to move the cursor quickly.
2. Input
devices take data from the computer system.
3. The
cursor indicates the user's current position on the screen.
4. Data can
be entered into the computer using a keyboard.
5. The mouse
is part of the computer's software.
6. Computers
do not have any intelligence.
7.
The software follows instructions
contained in a computer's hardware which command it to perform a particular
task.
8. The
Escape key allows you to stop the execution of a command.
9. The Enter
or Return key is used in combination with another key to perform a special
task.
10. The
Backspace key deletes the character immediately to the left of the cursor.
Task 2: Here are some basic mouse
actions. Match the terms in the box with the explanations below.
a. click b.
double-click c. drag
1.
Position the pointer on
something, then rapidly press and release the mouse button twice. (You do this
to load a program, open a document, or select text or graphics)
2.
Position the pointer on
something, hold down the mouse button, and move the mouse to the desired
position, then release the button.
(You do
this to move an image to a new location on the screen)
3. Position
the pointer on something, then press, and release the mouse button.
(You do
this to place the insertion point, to choose an option, or to close a window)