*Question*
Read the following article and select the best answer. Article: Some people in Manchester, Britain, will soon be paying for goods and services with so-called "smart" credit cards. These cards are more secure than the traditional magnetic-strip version and can be used to travel on buses, check bank accounts and do shopping. The Manchester project is one of the biggest smart card schemes in the world. Every time people use the cards on a bus or train, the fare is deducted (reduced) from the value of the card. When they have no credit left, the cards can be recharged at a local shop. A smart card looks just like a normal plastic card but it has a silicon chip in it. It is possible for the same silicon chip to perform a number of different functions, so one plastic card in your pocket could do a large number of different jobs. The card has much more memory space than a magnetic-strip card, so many more things can be recorded on it.There are two types of smart cards. One is the contact card which is used in the same way as a magnetic-strip card. Information is transferred by running the card through a narrow opening in an electronic reader. In the slot, electronic probes make contact with the magnetic-strip or silicon ship and read the information. The other type is the contactless smart card where the electronic reader communicates with the card by short-range radio waves. This makes the card quicker and more convenient to use because it does not have to leave your wallet. It is also more reliable as it is not easily influenced by scratches or dirt. However, the biggest advantage that smart cards have over magnetic-strip cards is that they are more secure. They are much more difficult to make than conventional cards and they have to be made by specially trained manufacturers. In addition, they have a large number of extra security features on them and if a smart card gets lost or stolen a quick phone-call to the distributor ensures that its individual number is made invalid and unreadable. This can be done more quickly than with a magnetic-strip card. Question: A smart credit card can do many kinds of jobs because _ . - it is smart - it is a plastic card - it has a silicon chip in it - it can be recharged
**Answer**
it has a silicon chip in it

*Question*
Read the following article and select the best answer. Article: Eleanor Roosevelt was born in New York City on October 11, 1884. When her mother died in 1892, the children went to live with Grandmother Hall; her father died only two years later. Attending a good school in England gave her, at 15, her first chance to develop self-confidence among other girls. In her circle of friends was a distant cousin, handsome young Franklin Delano Roosevelt. They became engaged in 1903 and were married in 1905. Within 11 years Eleanor bore six children; one son died early. In Albany, where Franklin served in the state Senate from 1910 to 1913, Eleanor started her long career as political helpmate. When he was stricken with polio in 1921, she took care of him devotedly. From his successful campaign for governor in 1928 to the day of his death, she dedicated her life to his purposes. When Mrs. Roosevelt came to the White House, she understood social conditions well and she transformed the role of First Lady accordingly. She broke the tradition to hold conferences, and expressed her opinions. This made her a target for political enemies but her sincerity of purpose made her personally popular to many. As she had written: "...if truth and loyalty are stamped upon her face, all will be attracted to her..." After the President Roosevelt's death in 1945, she returned to a cottage at his Hyde Park estate; she told reporters, "The story is over." Within a year, however, she began her service as American spokeswoman in the United Nations. She continued a positive career until her strength began to wane in 1962. She died in New York City that November, and was buried at Hyde Park beside her husband. Question: According to the passage, we can infer that Eleanor did well in the field of _ . - history - science - economics - politics
**Answer**
politics

*Question*
Read the following article and select the best answer. Article: Boys and girls,as we all know,most people,especially young people ,tend to care about their hair much because hair plays a very important role in our appearance.But can you imagine what other uses hair has?Do you have any idea that human hair may become a new solar energy soutce?Before we begin with the new content of our Physics ,let me tell you a new invention first. It's reported that a Nepali teenager has designed a $32 solar panel using human hair. Milan Karki,who is 18 years old and lives in a village in rural Nepal,used human hair to replace silicon ,which is a common but expensive componet of solar panels. By using hair as a replacement,Karki says that solar panels can be produced for around $32,a price that could be halved if they were mass-produced. The solar panel works,because melanin ,which gives hair its colour,is light sensitive and can act as an elecrtical conductor.Kaiki was inspired to think of the idea by a Stephen Hawking book ,which explained how to create elecrtic energy from hair. The device that Karki has invented is capable of producing 9V or 18V of energy--plenty to charge a mobile phone. "Half a kilo of hair can be bought for only 16p in Nepal and lasts a few months;whereas a pack of batteries would cost50p and lasts few nights,"according to The Daily Mail. The solar panel is claimed to be easy to service as the hair is easy to replace. Karki has now seng out several devices to other disrticts near his home for tetimg .He said,"First I wanted to provide elecricity for my home,then my village .Now I am thinking for the whole worle." So next time when you have a haircut,do remember to keep your hair cut down to use for energy.Perhaps you can also provide elecrticity for your home,even your village using your own hair. Question: Which of the following is true about the new invention? - We can buy solar panel for around $32 using hair as a replacement in the market. - The device can produce 9V or 18V of energy. - Karki thought of the idea of inventing the device all by himself. - Kaiki provides elecrticity for his home using hair.
**Answer**
The device can produce 9V or 18V of energy.