The surprising experiment I am about to describe proves that air is all aroud you and that it proves down upon you．Air pressure is a wonderful force．When you swim underwater, you can feel water push down your body．The air all around you does the same．However, your body is so used to it that you do not notice this ．The pressure is caused by a layer of air called the atmosphere．This layer surrounds the Earth , extending to about five kilometers above the Earth’s surface．
The following experiment is an easy one that you can do at home．But make sure that you are supervised , because you will need to use matches．Now for the experiment！
What you need
·A hard-boiled egg without the shell
·A bottle with a neck slightly smaller than the egg
·A piece of paper
·A match
Metheod
1) Check that the egg will sit firmly on the neck of the bottle．
2) Tear the paper into strips and put the strips into the bottle．
3) Light the paper by dropping a burning match into the bottle．
4) Quickly sit the egg on the neck of the bottle．
Result
Astonishingly,the egg will be sucked into the bottle．Your friends will be amazed when you show them the experiment．But be careful when you handle matches．
Why it happened
As the paper burns,it needs oxyen and uses up the oxygen(air) in the bottle．The egg acts as a seal in the neck of the bottle,so no more air can get inside ．This reduces the air pressure inside the bottle．The air pressure must equalize,so more air from outside must enter the bottle．The outside air pressure against the egg and then the egg is pushed into the bottle!The proves that air is all around and that it is pressing down on it．
1．When you do the experiment, why need you a person beside you?
A．You couldn’t place the egg on the bottle by yourself．
B．The egg needs to be shelled．
C．You need to use matches．
D．The bottle can’t sit firmly on the desk．
2．The purpose of doing this experiment is to prove ______．
A．air pressure is a wonderful force
B．water can push down your body when you swim underwater
C．the air pressure is not equalized around us
D．the earth is surrounded by a layer of air called the atmosphere
3．How did the egg put into the bottle？
A．The oxygen inside the bottle suckde the egg in．
B．It became solt without the shell．
C．The neck of the bottle was wide enough．
D．The outside air pressure forced it into the bottle．
4．The passage is ______．
A．an experiment report B．a scientific story
C．a research report D．an interesting novel
Directions: Read the following text and choose the most suitable heading from A-F for each paragraph．There is one extra heading which you do not need.
| A．Causes of overusing fluoride |
B．Negative effects of fluoride |
| C．Safe use of fluoride |
D．The expert’s background information |
| E．No need to worry about fluoride poisoning |
|
| F．Solutions to improper use of fluoride |
I have heard that fluoride can help stop dental decay, but I recently read that it is poisonous．Which of these is true? How can children use fluoride safely?
This question is answered by Dr Marcia M．Rich who practises general dentistry in Newholt．She is also a lecturer at the University and a writer for the monthly magazine Your Dentist Cares．
My answer to the first question is to stress that fluoride works well and is safe when users follow instructions．Young children have a tendency t
o swallow toothpaste, which is why they should only have a tiny amount of fluoride toothpaste on their toothbrush．If this simple measure is taken, parents can be confident that children will be protected against tooth decay, and come to no harm.
Almost all medicines have an adverse effect－or even be deadly－if they are not taken as directed．So you are right－fluoride can be poisonous if it is swallowed in very large quantities．It is for the reason that fluoride supplements can only be obtained on prescription from the doctor or dentist．Please be assured that fluoride overdoses are rare－in fact, I have never heard of any fatal incidents related to fluoride poisoning.
Scientific studies have shown that fluoride can help to prevent cavities as long as it is used correctly．If fluoride is abused, there is a risk of illness or even deaths in extreme cases．If a deadly amount of fluoride is taken, immediate first-aid could save a life．A person who has swallowed a large amount of fluoride will probably start vomiting．If not, the patient should be given milk or antacid and taken to the nearest hospital for emergency treatment.
Taking too much fluoride while teeth are growing can lead to a condition called dental fluorosis．The most likely cause is the swallowing of fluoride toothpastes by young children．It can also be caused by inappropriate use of fluoride drop or other fluoride supplements, for example when fluoride is already is already present in drinking water．
Twenty-first century humanity has mapped oceans and mountains, visited the moon, and surveyed the planets．But for all the progress, people still don’t know one another very well.
That brings about Theodore Zeldin’s “feast of conversation”－events where individuals pair with persons they don’t know for three hours of guided talk designed to get the past “Where are you from?”
Mr．Zeldin, an Oxford University professor, heads Oxford Muse, a 10-year-old foundation based on the idea that what people need is not more information, but more inspiration and encouragement.
The “feast” in London looks not at politics or events, but at how people have felt about work, relations among the sexes, hopes and fears, enemies and authority, the shape of their lives．The “menu of conversation” includes topics like “How have your priorities changed over the years?” Or, “What have you rebelled against the past?”
As participants gathered, Zeldin opened with a speech: that despite instant communications in a globalized age, issues of human heart remain．Many people are lonely, or in routines that discourage knowing the depth of one another．“We are trapped in shallow conversations and the whole point now is to think, which is sometimes painful,” he says．“But thinking interaction is what separates us from other species, except maybe dogs…who do have generations of human interactions.”
The main rules of the “feast”: Don’t pair with someone you know or ask questions you would not answer．The only awkward moment came when the multi-racial crowd of young adults to seniors, in sun hats, ties and dresses, looked to see whom with for hours．But 15 minutes later, everyone was seated and talking, continuing full force until organizers interrupted them 180 minutes later.
“It’s encouraging to see the world is not just a place of oppression and distance from each other,” Zeldin summed up．“What we did is not ordinary, but it can’t be madder than the world already is.”
Some said they felt “liberated” to talk on sensitive topics．Thirty-something Peter, from East London, said that “it might take weeks or months to get to the level of interaction we suddenly opened up.”What can the “conversations” be best described as?
| A．Deep and one-on-one. | B．Sensitive and mad. |
| C．Instant and inspiring. | D．Ordinary and encouraging. |
In a “feast of conversations”, participants ______.
| A．pair freely with anyone they like |
| B．have a guided talk for a set of period of time |
| C．ask questions they themselves would not answer |
| D．wear clothes reflecting multi-racial features． |
In paragraph 6, “they would be ‘intimate’” is closest in meaning to “______”.
| A．they would have physical contact | B．they would have in-depth talk |
| C．they would be close friends | D．they would exchange basic information |
From the passage, we can conclude that what Zeldin does is ______.
| A．an attempt to promote thinking interaction |
| B．one of the maddest activities ever conducted |
| C．a try to liberate people from old-fashioned ideas |
| D．an effort to give people a chance of talking freely |
| DONALD SLOAN |
||
| Gates Hall University of Kansas Lawrence, KS 66045 913-243-1682 |
After May 2009: 46 Clayton Drive St．Louis, MO 63130 314-726-8840 |
|
| Objective |
To work with the client (委托人) population in a social service position. |
|
| Education |
B.A., University of Kansas, Lawrence, KS, 2009 Major: Social Services Minor: Applied Psychology |
|
| Experience |
Assistant Activities Supervisor, Fairview Nursing Home, Lawrence, KS, November 2006-present．Help organize and implement recreational activities for nursing home residents．Activities include crafts, dances, day trips, sing-alongs, and visiting performers. Hotline Volunteer．Teen Crisis Center, Lawrence, KS, September 2006- May 2007．Handled crisis calls from teenagers in the community．Dealt with drug use, unwanted pregnancies, failing grades, and the breakdown of parent-teen relationships. Nurse’s Aide, Danyers General Hospital, St．Louis, MO, Summer 2006．Assisted nurses in patient care．Took histories, updated charts, and helped prepare patients for surgery. |
|
| Activities |
University Concert Board．Work with other board members to plan and implement on-campus concerts. Senior Gift Campaign．Help manage the campaign to raise funds for the senior class gift to the university. Residence Hall Programming Board．Planned social events for Eggar Residence Hall. |
|
| Skills |
Fluent in French．Water safety instructor．Skilled at working with people. |
|
| Interests |
Skiing, softball, classical music, and guitar． |
|
This passage is most probably ______.
| A．an advertisement for enrolling new employees |
| B．a school report at the end of an academic year |
| C．a self-introduction meant to apply for a job |
| D．a part of a recommendation letter from a university |
According to the “Experience” section, we can infer that Donald Sloan can be _____.
| A．a wise leader | B．a skillful performer |
| C．a gifted scientist | D．a good social worker |
From the passage we can learn that Donald Sloan ______.
| A．is good at singing and dancing | B．is about to graduate from a university |
| C．has an interest in being a surgeon | D．specializes in psychology |
They like using the Internet．They have lots of pocket money to spend．And they spend a higher proportion of it online than the rest of us．Teenagers are just the sort of people an online seller is interested in, and the things they want to buy－games, CDs and clothing－are easily sold on the Web.
But paying online is a tricky business for consumers who are too young to own credit cards．Most have to use a parent’s card．They want a facility that allows them to spend money.
That may come sooner than they think: new ways to take pocket money into cyber (网络的) space are coming out rapidly on both sides of the Atlantic．If successful, these products can stimulate online sales.
In general, teenagers spend huge amounts: $153bn (billion) in the US last year and ￡20bn annually in the UK．Most teenagers have access to the Internet at home or at school－88 percent in the US, 69 percent in the UK．According to the Jupiter Research, one in eight of those with Internet access has bought something online－mainly CDs and books.
In most cases, parents pay for these purchases with credit cards, an arrangement that is often unsatisfactory for them and their children．Pressing parents to spend online is less productive than pressing on the high street．They are more likely to ask “Why?” if you ask to spend some money online.
One way to help teenagers change notes and coins into cybercast is through prepaid cards such as Internet Cash in the US and Smart cards in the UK．Similar to those for pay-as-you-go mobile telephones, they are sold in amounts such as￡20 or $50 with a concealed 14-digit number that can be used to load the cash into an online account.What does the word “They” in paragraph 1 refer to?
| A．Sellers. | B．Buyers. | C．Teenagers. | D．Parents. |
According to the passage, which of the following statements is TRUE?
| A．More than half of the teenagers in the US and the UK have Internet access． |
| B．Teenagers pay for goods online with their own credit cards. |
| C．Most teenagers in the US and the UK have bought something online. |
| D．Teenagers found it easier to persuade parents to buy online than in a shop. |
A new way to help teenagers shop online is to use ______.
| A．a new machine | B．special coins and notes |
| C．prepaid cards | D．pay-as-you-go mobile phones |
What is the passage mainly about?
| A．Online shopping traps. | B．Internet users in the US and the UK. |
| C．New credit cards for parents. | D．The arrival of cyber pocket money. |
Dec. 24, 1848
Dear Johnston,
Your request for eighty dollars, I do not think it best to satisfy now. At the various times when I have helped you a little, you have said to me, “We can get along very well again,” but in a very short time I find you in the same difficulty again. Now this can only happen by some fault in your behavior. What that fault is, I think I know. You are not lazy, and still you are an idler(游手好闲). I doubt whether since I saw you, you have done a good whole day’s work, in any other day. You do not very much dislike to work, and still you do not work much, merely because it does not seem to you that you could get much for it.
This habit of uselessly wasting time is the whole difficulty; it is vastly important to you, and still more so to your children, that you should break this habit. It is more important to them, because they have longer to live, and can keep out of an idle habit before they are in it, easier than they can get out after they are in.
You are now in need of some ready money; and what I suggest is, that you shall go to work hard, for somebody who will give you money for it.
Let father and your boys take charge of your things at home-prepare for a crop, and make the crop, and you go to work for the best money wages, or to pay back any debt you owe. And to secure you a fair reward for your labor, I now promise you that for every dollar you will, between this and the first of May, get for your own labor, I will then give you one other dollar. By this, if you hire yourself at ten dollars a month, from me you will get ten more, making twenty dollars a month for your work.
Now if you will do this, you will soon be out of debt, and what is better, you will have a habit that will keep you from getting in debt again. But if I should now clear you out, next year you will be just as deep in as ever. You say you would almost give your place in Heaven for $ 70 or $80. Then you value your place in Heaven cheaply, for I am sure you can with the offer I make you get the seventy or eighty dollars for four or five months’ work. You say if I furnish you the money you will deed(抵押) me the land, and if you don’t pay the money back, you will deliver possession-Nonsense! If you can’t now live with the land, how will you then live without it? You have always been kind to me, and I do not now mean to be unkind to you. On the contrary, if you will but follow my advice, you will find it worth more than eight time eighty dollars to you.
Affectionately
Your brother
A. Lincoln Abraham Lincoln wrote the letter to Johnston mainly to ________.
| A．show his concern for him | B．recommend him to save money |
| C．decline his request and motivate him | D．introduce him a new job |
What’s the problem with Johnston, according to Lincoln?
| A．He was very lazy. | B．He wasted time a lot. |
| C．He couldn’t get much from work. | D．He disliked working. |
In the letter Lincoln suggested that Johnston should ________.
| A．keep himself from getting into trouble | B．go to work hard for somebody |
| C．manage well the things at home | D．keep the children out of the idle habit |
If Johnston got one dollar for his work, Lincoln promised to _________.
| A．reward him with labor | B．pay off his debt |
| C．hire him at 10 dollars a month | D．give him another dollar |
In order to get 80 dollars from Lincoln, Johnston promised to ________.
| A．take away his place in Heaven | B．deed Lincoln the land |
| C．live without the land | D．do good work every day |