What do you do if you're stranded(处于困境的)on a lonely island?
Surely you need to find a way to get in touch with the outside world. Your best
chance of doing this is to draw the attention of a passing plane.
Body signals(信号)
Pilots from different
countries understand body signals if they have the correct training. When you
wave your arms up and down in a straight line, it means "yes". When
you point downwards and swing your arm from side to side, it means
"no". If you want the pilot to know that it's safe to land, push your
hands out in front of you and bend(弯曲)your knees. If
you want to say that it's not safe to land, put your arms in the air and move
them to one side.
Smoke signals
The smoke from a fire can
be seen from far away, so it's a good way to draw attention. If the weather is
dry, it isn't hard to start a fire. Remember, however, that fires can be very
dangerous if they get out of control. Never light a fire unless you're sure
that it can't spread. If the ground is dark, light smoke can be seen more easily.
Green grass and leaves produce light smoke.
Ground-to-air signals
It's a good idea to build
some signals, too. Use large pieces of wood to make the symbols(标记). If you can't find any wood, use earth. Some useful symbols are:
F "I need food and water."
II "I need
medicine."
I "I am badly
hurt."
X" I am unable to
move from here."
Pilots' replies
If the pilot lowers the
plane's wings from side to side, this means "message received and
understood". (At night, the pilot flashes the plane's green lights.) If
the pilots flies the plane in a clockwise circle, this means "message
received but not understood".(At night, the pilot flashes the plane's red
lights.)
However, there is no signal which
means "message not received". Why not?
1. Which picture means "it's not safe
land"?

2. What can we learn from the passage?
A. Swinging your arm from
side to side means "yes".
B. If the ground is dark,
light smoke can't be seen.
C. If you need some
medicine, make a symbol "II".
D. The pilots make
replies with a blue light at night.
3.
What is the passage mainly about?
A. The explanation of
building signals on an island.
B. The importance of
making signals on an island.
C. Ways of sending out
signals on a lonely island.
D. Ways of receiving signals from
a lonely island