The Antarctic is actually a desert. It’s the only continent on the earth without a river or lake.
The Antarctic is all ice all year round. The warmest temperature ever recorded there is zero, at the South Pole. Explorers used to think that a place so cold would have a heavy snowfall. But less than ten inches of snow falls each year. That is less than half an inch of water. The times that much water falls in parts of the Sahara.
The little snow that falls never melts. It continues to pile up deeper and deeper year after year and century after century. When the snow gets to be about 80 feet deep it is turned to ice by the weight of the snow above it.
1. Antarctic is called a desert because it _______.
A. is sandy B. is cold C. has little water D. is high
2. The snow there is very deep because it _______.
A. never stop falling B. piles up year after year
C. never melts D. falls often
3. The best title for the passage is ______.
A. Waterfall at the South Pole B. The Antarctic ------An Ice Desert
C. Snowfall at the South Pole D. The world’s Great Desert
IN THE BEDROOM
Don’t smoke in bed ------it causes 1000 fires a year, many with fatal (致命的)results.
Don’t overload your electrical points: the right way is “one appliance（电器）, one socket”（插座）.
Don’t use an electric underblanket over you or an overblanket under you. An underblanket , unless of the low- voltage type, MUST be switched off before you get into bed.
Never let furniture or clothing get close to a lighted fire. Make sure that there is a suitable guard for the room heater.
Keep aerosol-type containers （喷雾器）away from heat and NEVER burn or puncture（刺穿）them.
Don’t dim a table lamp by covering it: buy a low-wattage bulb（灯泡）.
Pajamas （睡衣）and nightdresses, especially for children and elderly people, should be made from flame- resistant material.
IF CUT OFF BY FIRE
Close the door of the room and any fanlight or other opening and block up any cracks （缝隙）with bedding, etc.
Go to the window and try to attract attention.
If the room fills with smoke, lean out of the window unless prevented by smoke and flame coming from a room below or nearby. If you cannot lean out of the window, lie close to the floor where the air is clearer until you hear the fire brigade（队）.
If you have to escape before the fire brigade arrives, make a rope by knotting together sheets or similar materials and tie it to a bed or another heavy piece of furniture.
If you cannot make a rope and the situation becomes intolerable（难耐的），drop cushions or bedding from the window to break your fall, get through the window feet first, lower yourself to the full extent of your arms and drop.
If possible drop from a position above soft earth. If above the first floor, drop only as a last resort.
1. According to the instructions, fires in the bedroom can be caused by ________.
A. one appliance, one socket
B. smoking in bed
C. underblankets, of the low- voltage type
D. all of the above-mentioned points
2. In the bedroom, you are told _______.
A. not to use an electric underblanket or an electric overblanket.
B. to use an underblanket of the low-voltage type
C. to switch off an underblanket of the low- voltage type
D. not to use an electric underblanket over you
3. You should keep furniture or clothes away from a lighted fire because ________.
A. the fire is too low
B. furniture or clothes block light
C. there is no guard in the room
D. furniture or clothes catch fire easily
4. If you are cut off by fire, you should first ______.
A. try to stop smoke from coming into the room
B. lie down and wait for the fire brigade
C. escape by jumping immediately out of the window
D. close the window and call for help
Ⅳ阅读理解（每小题2分，共40分）阅读下面短文，从所给的四个选项中，选出最佳答案。
We shall not drown（淹死）if we remember these rules:
1, Never swim alone.
2, Never swim at a beach if there is no lifeguard（救生员）.
3, Never swim after a meal or when you feel hungry or tired.
4, Never depend on rings, floats（漂浮物）or other swimming aids（助游具）. You may lose them or they may let you sink（下沉）.
5, Don’t stay in the water too long , especially if it is cold.
6, Before you dive, be sure the water is deep enough and you will not hit anybody.
7, Never go out in a boat if you can not swim or if you are not wearing a life jacket.
If you get into difficulty, this is what you should do :
1, Keep calm（镇定）. Save you strength and your breath.
2, Try to float on your back or tread（踩水）water. To tread water, move your feet as if you are climbing some stairs.
3, Raise your right arm for help.
Remember : a red flag means that it is dangerous for all swimmers to enter the water. A blue flag means that it is dangerous for children and weak swimmers to enter the water.
1. When you see a red flag, you know that ______ swim there.
A. no one should B. anyone may
C. only strong swimming should D. children should not
2. We can go swimming ________.
A. after a meal B. if we have a ring
C. when the water is dirty D. when we are not alone
3. We should dive only when _______.
A. the water is deep enough B. the water is cold
C. the water is warm D. we are not alone
4. What the writer wants to say is that ______.
A. rings and floats are of no use B. boats are not safe
C. we must be very careful in swimming D. swimming is bad for your health
I think physics is ________ and difficult ________.
|
A．confused; to learn |
B．confusing; to be learned |
|
C．confused; to learn it |
D．confusing; to learn |
An oil tanker hit a rock ______ the northwest coast of Alaska.
|
A．on |
B．in |
C．off |
D．to |
. Although he has taken a lot of medicine, his health _______ poor.
|
A．proves |
B．remains |
C．continues |
D．becomes |
