题目内容
If you go into the forest with friends who are older than you are, stay with them. If you don't, you may get lost. If you get lost, this is what you should do.
Sit down and stay where you are. Don't try to find your friend--let them find you. You can help them to find you by staying in one place.
There is another way you can help your friends or other people to find you. Give them a signal
(信号)by shouting three times. Stop. Then shout three times again. Any signal given three times is a call for help.Keep up the shouting, always three times together. Then the people who hear you will know that you are not just making noise for fun
(开玩笑). They will let you know that they have heard your signal. They will give two shouts. When a signal is given twice it is answer to a call for help.If you don't think you will be found before nights comes, get some branches
(树枝). Try to put them together so that they make a little house. Cover up the holes with branches that have lots of leaves. Make yourself a soft bed with leaves and grass.What should you do if you get hungry or need drinking water? You should leave your little branch house to look for a fiver. Don't just walk away. Make a trail
(痕迹)for yourself so you find your way back. Do this by picking off small branches and dropping them as you walk.The most important thing to do when you are lost is--STAY IN ONE PLACE.
(1)The passage is about ______________________ .
[ ]
A
.how to avoid(避免)getting lostB
.how to find your way backC
.how to make a call for helpD
.what to do if you get lost(2)According to this passage, you may have _______________ to help your friends find you while you're lost.
[ ]
A .one way |
B .two ways |
C .three ways |
D .four ways |
(3)What does it mean by keeping up the shouting always three times together?
[ ]
A
.A call for help.B
.An answer to a call for help.C
.A noise for fun.D
.A traffic signal.(4)If you really have to leave your place while you get lost, you should _______.
[ ]
A
.keep on shouting while shoutingB
.give a signal on your wayC
.look for a riverD
.make a trail with branches(5)What advice
(建议)is given by the writer if you get lost?[ ]
A
.Making yourself a soft bed.B
.Keeping on shouting.C
.Staying in one place.D
.Trying to find help from your friends.The Indians invented and developed the system of numbers from 1 to 9 and 0. We can use the ten numbers to make any number from the biggest to the smallest.
However, the ancient Romans invented a different system (系统) of numbers. They used symbols (符号) and replaced them. 1 is “Ⅰ” and 2 is “Ⅱ”. For larger numbers, they invented new symbols—5 is “Ⅴ”, 10 is “Ⅹ”, and so on. But they didn’t have a symbol for zero.
Here’s a table of the Roman numbers.
1 | 5 | 10 | 50 | 100 | 500 | 1,000 |
Ⅰ | Ⅴ | Ⅹ | L | C | D | M |
The Romans combined their symbols. In this way, “Ⅶ” means “5+1+1”, or 7. However, they found that “ⅡⅡ” (for 4) and “ⅤⅡⅡ” (for 9) were too confusing, so they thought out another idea.
If the “Ⅰ” comes after the “Ⅴ”, then you add it (Ⅵ is 6); if the “Ⅰ” comes before the “Ⅴ”, then you subtract (减去) it (Ⅳ is 4). The rule is that you are allowed to add up to three (e.g. Ⅷ is 8), but only subtract one (e.g. XL is 40).
How to remember the symbols?
Ⅰis like a finger. In a whole hand, the thumb (拇指) and the little finger make a V. Ten fingers are both hands, so the two Vs make an X..
Here is a way to remember the other symbols (L, C, D, M):Little Cats Drink Milk.
( ) 51. How many numbers can we make according to the Indians’ system ?
A. three: 0, 9, 1 B. ten C. eleven D. lots of
( ) 52. Which number was not in the ancient Roman’s number system?
A. 1 B. 9 C. 0 D. 5
( ) 53. What does the underlined word “combined” probably mean in the passage?
A. 合并 B. 分离 C. 增加 D. 削减
( ) 54. What does MD mean according to the Romans’ rule of calculating?
A. 500 B. 1000 C. 1500 D. 2000
( ) 55 Which sentence is NOT true according to the passage?
A. “Little Cats Drink Milk” can help us to remember some of the numbers symbols.
B. The Indians invented the system of numbers from 1 to 9 and 0.
C. You are not allowed to make a number like “XXL”
D. The ancient Romans repeated symbols to make any number.