Adam Smith was the first person to see the importance of the division of the labor. He gave us an example of the process by which pins were made in England. One man draws out the wire, another strengthens it, a third cuts it, a fourth points it, and a fifth gives it a head. Just to make the head requires two or three different operations. The work of making pins is divided into about eighteen different operations, which in some factories are all performed by different people, though in others the same man will sometimes perform two or three of them. Ten men, Smith said, in this way, turned out twelve pounds of pins a day or about 4,800 pins a worker. But if all of them had worked separately and independently without division of labor, they certainly could not have made twenty pins in a day and not even one. There can be no doubt that division of labor is an efficient way of organizing work. Fewer people can make more pins. Adam Smith saw this, but he also took it for granted that the division of labor is itself responsible for economic growth and development and it accounts for the difference between expanding economies and those that stand still. In fact, the division of labor adds nothing new, and it only enables people to produce more of what they already have. According to the passage, Adam Smith was the first person to _ . A) take advantage of the physical labor B) introduce the division of labor into England C) understand the effects of the division of labor D) explain the causes of the division of labor
C
(Question)
Global Positioning Systems(GPS) are now a part of everyday driving in many countries. These satellite-based systems provide turn-by-turn directions to help people get to where they want to go. But, they can also cause a lot of problems, send you to the wrong place or leave you completely lost. Many times, the driver is to blame. Sometimes a GPS error is responsible. Most often, says Barry Brown, it is a combination of the two. We spoke to Mr. Brown by Skype . He told us about an incident involving a friend who had flown to an airport in the eastern United States. There he borrowed a GPS-equipped car to use during his stay. BARRY BROWN: "And they just plugged in an address and then set off to their destination. And, then it wasn't until they were driving for thirty minutes that they realized they actually put in a destination back on the West Coast where they lived. They actually put their home address in. So again, the GPS is kind of 'garbage in garbage out'." Mr Brown says this is a common human error. But, he says, what makes the problem worse has to do with some of the shortcomings, or failures, of GPS equipment. BARRY BROWN: "One problem with a lot of the GPS units is that they have a very small screen and they just tell you the next turn. Because they just give you the next turn, sometimes that means that it is not really giving you the overview that you would need to know that it's going to the wrong place." Barry Brown formerly served as a professor with the University of California, San Diego. While there, he worked on a project with Eric Laurier from the University of Edinburgh. The two men studied the effects of GPS devices on driving by placing cameras in people's cars. They wrote a paper based on their research. It is called "The Normal, Natural Troubles of Driving with GPS." It lists several areas where GPS systems can cause confusion for drivers. These include maps that are outdated, incorrect or difficult to understand. They also include timing issues related to when GPS commands are... What is the disadvantage of small screens in GPS equipment according to the text? A) They just provide the next turn. B) They are harmful to eyes. C) They make drivers tired easily. D) They often break down suddenly.
(Answer)
A
Ques: Have you ever been to the beautiful country of Holland and its capital Amsterdam? Anyone who has traveled to Amsterdam would probably agree on one thing: Amsterdam's story is a tale of two cities -- one during the day and a completely different one at night. During the day, the largest city in the Netherlands sits quietly on the Amstel River.You can rent a bicycle, visit the Van Gogh or Anne Frank museum, or take a water taxi.But when the sun goes down, the partying begins.In the big clubs and in coffee shops, tourists gather to hang out, talk politics and smoke. Several areas of the city clearly show the two worlds that rule Amsterdam.And they're all within a short cab ride of each other.For example, Dam Square attracts daytime sightseers to its festivals, open markets, concerts and other events.Several beautiful and very popular hotels can be found there.And there's the Royal Palace and the Magna Plaza shopping mall. But at night party-seekers come to the square.Hip hop or funk music is heard there..So if you come, be ready to dance.The clubs don't shut down until 4 am. And while you're there, check out the various inexpensive ways to tour the city.Don't worry about getting lost.Although Dutch is the official language, most people in Amsterdam speak English and are happy to help you with directions.And you'll notice that half the people in the streets are on bicycles they rent. Amsterdam also has a well-planned canal system.For about 10 dollars, you can use the canal bus or a water taxi to cruise the "Venice of the North". The city has a historic past.One impressive place to visit is the Anne Frank House on Nine Streets.It was there that the young Jewish girl wrote her famous diary during World War II.Visitors can view Anne's original diary and climb behind the bookcase to the room where she and her family hid from the Nazis for two years. What means of transport is not available to visitors in Amsterdam? A) A carriage. B) A bicycle. C) A canal bus. D) A water taxi.
Ans: A
Ques: Wisdom teeth are normally the last teeth to appear.This usually happens when people are in their late teen years or early twenties,in other words,when they are older and wiser. Wisdom teeth can grow into place normally and never cause a problem.But often there is not enough room for them in the mouth;they might crowd other teeth.Sometimes they even push sideways through the gums . An impacted wisdom tooth is one that fails to completely rise through the gums.Wisdom teeth that only partly break through can leave space for bacteria to enter around the teeth.Infection is a risk in these cases. Wisdom teeth that are not well lined and become impacted are often removed.The American Dental Association says removal is generally advised when wisdom teeth only partly break through the gums.Removal is also advised if there is a chance that wisdom teeth ate poorly lined.The best time to remove is before the teeth cause any problems or pain.Young adults are the best candidates for wisdom teeth removal. But why do we have wisdom teeth if we often need to get them removed?One theory has to do with our diets.Scientists say the diet of ancient humans probably required more chewing teeth.Life was probably a little rougher on the teeth back then,too.So it was good to have extras. Wisdom teeth should be removed _ . A) when they break through the gums B) when they are below the gums C) if they are not well lined or get impacted D) if they take up enough room in the mouth
Ans:
C