题目
题型:不详难度:来源:
Below is a description of a single scientific experiment. It shows us how iron reacts ( 反应) with air and with water. Aim : To find out if iron rusts( 生锈) (a) in dry air ; (b) in water that has no air in it ( air- free water) ; (c) in ordinary water. Materials : 3 clean iron nails ( 铁钉) ; test tubes ; test tube holder ; cotton wool ; oil ; Bunsen burner. | |
Iron in dry air Method (1)Put some iron nails at the bottom of a test tube. (2)Push some cotton wool down the tube. (3)Leave the tube for one week. Result After one week, the nails have not rusted. Conclusion Iron does not rust in dry air. Iron in air-free water Method (1)Half-fill a test tube with water. (2)Boil the water for three minutes. (This makes sure there is no air in the water. (3)Put two or three clean nails in the water. | (4)Add some oil to the water. (This will keep air out of the water.) (5) Leave the tube for one week. Result The nails do not rust in the tube with air-free water. Conclusion Iron does not rust in air- free water. Iron in ordinary water Method (1)Half –fill a test tube with water and add two or three clean nails. (2)Leave the tube for one week. Result The nails rust in the tube with ordinary water. Conclusion Iron rusts in ordinary water. (238 words) |
A.keep the air dry | B.keep the tube wet |
C.make the nails rust | D.keep the tube clean |
①Leave half a tube of water in it
②Boil the water for some time
③Put some clean iron nails in the tube
④Add some oil to the water
A.①② | B.①③ | C.②③ | D.②④ |
A.dry air | B.cotton wool | C.ordinary water | D.air-free water |
答案
小题1:A
小题2:D
小题3:C
解析
小题1:细节理解题。这个实验的目的就是提供干燥空气,因此可推测棉花羊毛的作用是吸湿,保持空气干燥。
小题2:细节理解题。从Iron in air-free water这个实验的方法中可知,第二步和第四步就是为了使水中不含有空气。
小题3:细节理解题。通读三个实验可排除A、B、D三项,通过Iron in ordinary water这个实验的结论可知“Iron rusts in ordinary water.”这也是三个实验中唯一使铁生锈的条件。
核心考点
试题【A Simple Scientific ExperimentBelow is a description of a single scientific expe】;主要考察你对教育文化类等知识点的理解。[详细]
举一反三
So, what will life on a seastead be like? Probably a bit like life on a cruise liner (游轮), but much larger, with shops, gyms, swimming pools, schools and other areas. In fact, the early seasteads may actually be specially-rebuilt cruise liners. But as science advances, Friedman believes they’ll become more like floating cities, with several hundred people.
Seasteading raises a lot of questions. First of all, how will the new countries make money? The Seasteading Institute has suggested several money-making ideas, including ocean-based theme parks, casinos (赌场) and fish farming. There’s also the questions of safety. With storms, typhoons and pirates (海盗) , the high seas are a dangerous place. However, the Institute says that it can stand bad weather and prevent crimes with its well-designed systems.
So, is this just a day dream? Well, maybe not. One of the people behind the project is Peter Thiel. He founded PayPal and was one of the first investors (投资者) in Facebook. So far, he’s donated $ 500,000 to the project.
And Friedman isn’t wasting any time. He recently announced the creation of the Poseidon Award. This will be given to the first seastead with fifty people. Friedman is hoping to hand out the award in 2015.
小题1:Where did Friedman use to work?
A.In Facebook. | B.In Seastead Institute . | C.In PayPal. | D.In Google. |
A.a cruise liner | B.a floating city | C.a theme park | D.a fishing farm |
A.Friedman is planning to move to a new country. |
B.Friedman is worried about the safety of seasteads. |
C.Friedman has got some supporters for his project. |
D.Friedman has already won the Poseidon Award. |
A.Seasteading: a new idea of living |
B.Seasteading: a wild way of farming |
C.Peter Thiel: a man behind the project |
D.Patri Friedman: a crazy day dreamer |
Tibetan Antelopes
Tibetan antelopes (藏羚羊) are medium-sized animals. They mainly feed on grass. They are usually found in groups of about 20. They are killed for their wool, which is warm, soft and fine and can be made into expensive clothes. Although people can get the wool without killing the animals, people simply kill them before taking the wool. The number of them is dropping year by year. There are less than 75,000 Tibetan antelopes left in the world, down from a million 50 years ago.
Golden Monkeys
Golden monkeys are mainly found in Sichuan, Gansu, Shanxi provinces and Shengnongjia mountainous area of Hubei Province. Golden monkeys have golden-orange fur. They move around in the daytime, usually in groups of as many as 100 to 200 heads, or 20 to 30 heads. They feed on fruits and young leaves of bamboos. But people are destroying the environment where they live. Trees and bamboos are disappearing, so golden monkeys have less and less to eat.
Elephants
Elephants are very big and strong. They are bigger than any other animals on land. They are grey and have long trunks and tusks. They have poor eyesight, but very good hearing and smell. They can lift heavy things and break down branches with their trunks. Elephants are very friendly towards each other and towards their neighbours. Normally, they live in a group for many years. Young male elephants do not leave the group until they are about 12 years old. Now, there are very few elephants in the world. The number of them is becoming smaller and smaller because their living areas are used for farming. Also, people hunt them for their tusks.
Wolves
Wolves are not very big. They have grey fur. Wolves have very good eyesight, hearing and smell. Wolves’ food is various. They eat animals, insects and snails. They are friendly to each other and never attack people. They do not kill for fun. Wolves are in danger, too. They are losing their living areas because people cut down forests. Soon they will have no home or food.
小题1:Tibetan antelopes usually live in groups of about _______.
A.20 | B.30 | C.100 | D.200 |
A.Tibetan antelopes. | B.Golden monkeys. |
C.Elephants. | D.Wolves |
A.There are less than 7,500 Tibetan antelopes left in the world now. |
B.Golden monkeys usually move around during the night. |
C.Elephants have good eyesight, but very poor hearing and smell. |
D.Wolves are friendly to each other and they never attack people. |
A.Wild animals in danger |
B.How to hunt wild animals |
C.Animals in the zoo |
D.How to train the animals |
小题1:How many experiments are there in the pictures?
A.Six. | B.Five. | C.Three. | D.Two. |
a. Pour 3/4 of the water away.
b. Put a balloon on the bottle.
c. Put the bottle in a bucket of hot water. The air rises into the balloon.
A.a, b, c | B.a, c, b | C.b, a, c | D.c, a, b |
A.Some ice. | B.Some water. |
C.Some ice and water. | D.A cloud and some water. |
A.It will be bigger. | B.It will be broken. |
C.It won’t change. | D.It will be in the bottle. |
1. Where are the rainforests?
Rainforests cover six per cent of the Earth’s surface. There are rainforests in many parts of the world but the biggest forests are in South America, Africa and South East Asia. There aren’t any rainforests in Europe or North America.
2. What’s in the rainforests?
About 75% of all the types of animals that we know come from rainforests. Thousands and thousands of animals live in rainforests. There are many very beautiful birds, insects and reptiles. Many of them live in the trees, more than 30 metres from the ground. There are also thousands of different plants—and lots of tall trees! It is always hot in a rainforest and
the ground is always wet. It is also dark.
3. Why are the rainforests important?
The rainforests are very important for us. We need them! The trees and other plants in the forest help to make the air that we breathe. They give us wood, rubber, fruits and many of our medicines.
4.
Unfortunately, in many places, the rainforests are in danger. For example, many years ago there was a large rainforest in Java. There were thousands of different plants and animals in the forest, but now there is nothing. People chopped down the trees because they wanted to grow rice. Many animals lived in the rainforest. Some of them went to other parts of Java but many of them disappeared — forever. The same thing is happening now in many other parts of the world. The rainforests are in danger.
小题1:In which of the following places can we find rainforests according to Paragraph 1?
A. In the UK. B. In Asia. C. In the USA. D. In France.
小题2:Which of the following belongs to a kind of “reptile”?
A.A sparrow. | B.A swallow. | C.A snake. | D.A butterfly. |
A.What’s happening to the rainforests? |
B.What can we find in the rainforests in Java? |
C.Why did people chop down the trees in the rainforests? |
D.Why did many plants and animals disappear in the rainforests? |
A.To tell us how to survive in the rainforests. |
B.To help us know some living things in the rainforests. |
C.To tell us to care about the protection of the rainforests. |
D.To give us advice on how to make full use of the rainforests. |
"She was wearing a fashionable coat. His shirt was really a fashionable colour. "
But of course there are fashions in many things, not only in clothes. There are fashions in holidays, in restaurants, in films and books. There are even fashions in school subjects, jobs ... and in languages.
Fashions change as time goes. If you look at pictures of people or things from the past, you will see that fashions have always changed. An English house of 1750 was different from one of 1650. A fashionable man in 1780 looked very different from his grandson in 1860.
Today fashions change very quickly. Some of this is natural. We hear about things much more quickly than in the past. Newspapers, radios, telephones and television send information from one country to another in a few hours.
New fashions mean that people will buy new things, so you see there is money in fashion.
小题1:Most people think that "fashion" means __________.
A.subjects | B.holidays | C.books | D.clothes |
A.finding a job |
B.looking at pictures |
C.eating in a restaurant |
D.wearing a fashionable coat |
A.three | B.four | C.five | D.six |
A.people like fashion and money |
B.fashionable things are expensive |
C.one can make money through fashion |
D.a fashionable man makes much money |
A.the changes of fashions |
B.the kinds of colours |
C.the money in fashion |
D.the differences between houses |
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