网址：http://m.1010jiajiao.com/timu_id_286890[举报]
salt water into fresh.
Why aren't there many factories like the Symi factory?
In some places,the sun isn't hot enough,or it doesn't shine every day. In these places ,other ways of
heating (加热)sea water can be used. These ways cost more money ,but they work faster than the sun.
By boiling (煮沸)sea water with high heat ,a lot of fresh water can be made quickly.
But heating is not the only way to get fresh water from salt water. Other ways are tried. One way is
freezing (冷冻). The fresh part of salt water freezes first. To get fresh water, the pieces of ice are taken
out. Which way is best? The one that gives the most water for the least money. It may be a different
way for each place. Symi's way seems very good for small, hot places. It doesn't make very much
water at a time. But the factory is easy to build and cost little.
That's why people in many dry places talk about Symi!
B ．is needed in every country
C ．is very important for factories
D ．is very important for factories
B ．can be built everywhere
C ．can make much fresh water at a time
D ．doesn't need sunshine every day
B．The way in sunny places.
C．The Symi's way.
D．Freezing the sea water in cold places.
B．the ways of making fresh water from sea water
C．hot places and dry places
D．how to make good use of the sunlight
B．Heating can make a lot of fresh water quickly.
C．The best way is to get the most fresh water with the least(最少)money
D．The Symi's way doesn't work in dry places .
－ It seems to me traveling by plane is dangerous.
－ I don't think so. ______ planes have the best safety records.
A. At most B. At least C. At last D. At present
查看习题详情和答案>>
－ It seems to me traveling by plane is dangerous.
－ I don't think so. ______ planes have the best safety records.
A. At most B. At least C. At last D. At present
查看习题详情和答案>>
A man walked into a restaurant. The restaurant advertised it had the 1 menu in the world. The manager was very proud of being able to provide any dish, no matter how 2 it was.
At the bottom of the 3 , there was a notice that said, “If you do not see the dish you need on this menu, please tell us and we will add it to the menu right away.”
The man 4 the menu and decided to make sure if it was true. He would order 5 that was very unusual.
When a waiter came up to take his order, he said, “You say you can serve any dish, even if it’s not on your longest menu in the world.”
“That is correct, sir. We are able to meet everyone’s requirements.”
“Well,” the man said, “bring me a sandwich with two elephant ears. 6 , not African.”
The waiter wrote down in his paper: Two Indian elephant ears on toast.
“Very good, sir,” he said. “That shouldn’t 7 long.”
The waiter walked away quickly.
The man was very surprised and rather disappointed.
Then he smiled 8 the waiter returned with a very unhappy look on his face.
“Ah!” the man said. “You can’t 9 it to me, can you?”
The waiter made an apology (道歉).
“I’m very sorry, sir, and this is the 10 embarrassing,”（困窘 ） he said, “but I’m afraid we can’t because we’ve run out of bread.”
1. A．biggest B．thickest C．heaviest D．longest
2. A．unfair B．unusual C．beautiful D．important
3. A．menu B．dish C．restaurant D．table
4. A．looked for B．took out C．looked at D．picked up
5. A．anything B．nothing C．everything D．something
6. A．American B．Indian C．Canadian D．Australian
7. A．pay B．cost C． take D．spend
8. A．as B．and C．so D．though
9. A．catch B．take C．fetch D．bring
10. A．least B．most C．less D．more
查看习题详情和答案>>
Teeth are important. Strong, healthy teeth help you chew all kinds of foods that help you grow. They help you speak clearly. And yes, they help you look your best. Here are some tips for you to take care of your teeth.
1.How many times at least should we brush our teeth a day?
A. 1. B. 2. C. 3. D. 4.
2.What is the major cause of tooth decay?
A. Not brushing teeth. B. Not changing toothbrushes.
C. Eating sugar. D. Not flossing teeth.
3.How often should we change our toothbrushes?
A. Never. B. Three times a month.
C. Every three months. D. Every month.
4.The bristles of the toothbrush must be_______.
A. hard B. soft. C. expensive. D. not mentioned.
5.Which is the right way to take care of your teeth?
A. Only brush front teeth.
B. Don’t brush teeth before sleeping.
C. Spend at most three minutes brushing teeth each time.
D. Eat lots of fruit and vegetables and drink water instead of soda.
查看习题详情和答案>>