Put an ice cube from your fridge into a glass of water. You have a piece of string(线) 10 centimeters long. The problem is to take out that piece of ice with the help of the string. But you must not touch the ice with your fingers.![]()
You may ask your friends to try to do that when you are having dinner together. There is a saltcellar on the table. You must use salt when you carry out this experiment.![]()
First you put the string across the piece of ice. Then put some salt on the ice. Salt makes ice melt(融化). The ice round the string will begin to melt. But when it melts, it will lose heat. The cold ice cube will make the salt water freeze again.
After a minute or two you may raise the piece of string and with it you will raise your piece of ice!![]()
This experiment can be very useful to you. If, for example, there is ice near the door of your house, you must use very much salt to melt all the ice. If you don’t put enough salt, the water will freeze again.![]()
【小题1】 We must use _______ when we carry out this experiment. ![]()
| A.fridge | B.some food | C.a table | D.some salt |
| A.More than three minutes. | B.Five minutes or so. |
| C.Only one minute or two. | D.About ten minutes. |
| A.Put the ice cube into the glass of water with the help of the string. |
| B.Take out the ice cube in the glass of water with the help of the string. |
| C.Take out the ice cube in the glass of water with your fingers. |
| D.Put some salt on the ice cube and then put the string across it. |
| A.Three. | B.Four. | C.Six. | D.Seven. |
| A.physics | B.biology | C.chemistry | D.maths |
Student Services
Students' Union
Every University has a Students' Union. If students are the lifeblood of a university, the Union is surely its beating heart.
For students, by students
A Students’ Union is run by students and acts independently. At the end of each academic year, it will find six students to hold a sabbatical(带有休假的) position managing the Union for the coming year. That the six successful sabbatical officers have only recently experienced issues affecting students ensures that your needs are very well understood.
Letting your hair down
Although the University is spread across a fairly wide area, the Union is centrally located and is only a short walk from any of the main buildings. This makes it very easy to catch up with friends who might be on a different course.
At night, the place really comes alive – we have three different bars to suit every occasion. The venues are student-only so you can be sure of meeting people with a similar outlook and we throw in a transport service to make sure you get home safely.
The Union also organizes various formal balls throughout the year, with the highlight being the end-of-year ball.
Supporting you
Beyond having fun, we also make sure some of the more serious issues are effectively dealt with. If you have a problem with your course, another sabbatical officer is trained to help you. Being independent from the University means we can represent and support you to the best of our ability, and once you reach university you may find that you become aware of more national or political issues.
【小题1】From the second paragraph of the passage, we can infer that ______.
| A.a Students’ Union is operated by the university |
| B.a Students’ Union is not operated by the university |
| C.a Students’ Union is operated is working for the university |
| D.a Students’ Union is affected by the university |
| A.learns what the students need |
| B.is very happy and easy |
| C.can affect the life of any student |
| D.has understood everything of the University |
| A.a Students’ Union is far away from the university |
| B.a Students’ Union is near to the home |
| C.a Students’ Union is central part of the university |
| D.a Students’ Union has different courses for all the students |
| A.making friends |
| B.dancing in a bar |
| C.the match of the end-year ball |
| D.electing the officers |
| A.the Students’ Union can help a student who has trouble in the study |
| B.the Students’ Union can help a student who is being trained |
| C.the Students’ Union can cultivate the ability of a student to be suitable for political position |
| D.the Students’ Union can support a student to run the University |
Attending a university is an important part of a person’s life. Today, many people go to a university to study and train for a future job in subjects like law, medicine, or education. But the university is not a modern invention. It has a history that is over a thousand years old.
The world’s oldest university, Al-Azhar, is in Cairo, Egypt. It was first built as a mosque in A.D. 972. A few years later, learners and teachers began meeting in the mosque in “tutoring circles”. They read and talked about the subject of law. Around 988, leaders in the city of Cairo decided to create a school for higher learning and the University of Al-Azhar was founded.
At Al-Azhar, there were many university ‘firsts.’ Courses were created. The earliest ones taught at Al-Azhar were in law and religion. In a course, students read and studied with the teacher, but there was also free discussion. Often, students and teachers talked about a topic, and there was no ‘right’ answer. Finally, scholars from around the world came to Al-Azhar to teach and do research. At the university, people studied the past, but it was also a place for sharing new ideas.
Over a thousand years later, Al-Azhar is still an important university in the world. Its library contains more than 250,000 of the world’s oldest and most valuable books. Today, many of the world’s most important universities such as Oxford and Harvard still follow the traditions started at Al-Azhar.
【小题1】What’s this passage mainly about?
| A.The history of the world’s oldest university. |
| B.The importance of attending a university. |
| C.The relationship between university and future job. |
| D.The invention of a modern university. |
| A.a hundrend | B.hundreds of | C.a thousand | D.thousands of |
| A.Oxford | B.Cambridge | C.Harvard | D.Al-Azhar |
A. A series of lessons. C. A period of time.
C. A series of actions. D. A group of professors.
【小题5】What’s the main idea of the last paragraph?
| A.How many books are in the Al-Azhar’s library. |
| B.How valuable the Al-Azhar’s books are. |
| C.Why Oxford and Harvard still follow Al-Azhar’s pattern. |
| D.How Al-Azhar still holds an important role in the world. |
Natural ways of keeping time![]()
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In ancient times, people had to use the sun and the moon to tell time. They got up when the sun came up and worked in the fields until the sun went down.
Man-made things
The sand clock is made of two glass balls joined by a narrow neck. The top ball was filled with sand. The sand slowly moved through the neck into the bottom ball. People knew how much time had passed when all the sand had fallen to the bottom ball.
People also made the water clock. They made a small hole near the bottom of a pot. Then they filled the pot with water. Markings inside the pot showed how much time passed as the water dripped (滴) out of the hole.
Nature’s Clocks in Living Things
◆Animals’ Body Clock
Animals do not need clocks to know time. They have a way of telling time by their bodies. Birds know when to fly to warmer places before winter. Some animals know when to keep more food for the cold winter months. Some fish know when it is time to move up the river and lay eggs.
◆Plants have their own clocks
Plants also have their own clocks to keep time. Plants know when to open flowers or when to drop their leaves.
◆The Body Clock in Human Beings
People also have their own body clocks. When we get used to our lives, our body clocks can be very accurate (准确的). It can tell us when it is time to wake up. It can also tell us when to eat or to go to sleep.
【小题1】How could an ancient farmer know when to go back home in the daytime?
| A.By looking at the moon. | B.By looking at the stars. |
| C.By looking at the sun. | D.By feeling whether tired or not. |
| A.2. | B.3. | C.5 | D.6. |
| A.both of them have a hole. | B.both of them are designed with glass balls. |
| C.both of them can be used only once. | D.both of them tell time in the same way |