Read the article and select the best answer. Article: Range At present,there are five network firms---China Telecom,China Unicom,Jitong Communications,China Netcom and China Mobile---that are allowed to operate IP services in China.Each company has its advantages in service. Charge As the Ministry of Information Industry co-ordinates,the charges of IP calls of the five companies are the same,0.30 yuan per minute for DDD calls.4.80 yuan per minute for IDD calls,2.50 yuan for calls from the mainland to Hong Kong,Macao,and Taiwan,and 1.50 yuan from Shenzhen to HK,Zhongshan and Zhuhai to Macao.IP callers don't enjoy discounts on holidays. China Telecom has the widest coverage.All cities in China with telephone access and most countries in the world are open to China Telecom's IP card. China Unicom's IP card can reach 29 cities nationwide and more than 130 countries and regions worldwide.Jitong IP can access 12 cities in China and over 70 countries and regions worldwide. China Netcom's IP card can reach 14 cities in China and 149 countries and regions in the world. China Mobile's IP card is open to only six cities nationwide but can access more than 200 countries and regions worldwide. Voice quality China Telecom realizes its IP service by the public Intermet,therefore net congestion and voice delay may sometimes disturb conversations.The other four companies have their private data networks,which help to increase transmission speeds and improve voice quality. Other services China Telecom,Jitong and China Mobile offer account transfer services.Users can transfer the remaining sum of money on one card to another card. Jitong and Netcom Link their services with bank cards.One can enjoy IP's service without an IP card.Bank card users can make IP phone calls with their bank card numbers,so they needn't buy new IP cards and remember the new numbers again and again. As for customer service,China Telecom,China Unicom and China Mobile provide free hot line service,while Jitong and Netcom charge for their services. Question: Which of the following is mentioned in the passage? Options: A: China Unicom charges IDD calls more than the other four firms. B: China Mobile's coverage is the least of the five firms. C: China Telecom accesses many more cities nationwide than the other four. D: China Netcom is the only one to be allowed to operate IP service.
C

(Question)
Read the article and select the best answer. Article: Do you suffer from cybersickness? The rise of mobile phones has been blamed for a number of social ills, but your smart phone may also be making you physically sick as well. Scientists have identified a condition called "cybersickness", which they say is the digital version of motion sickness. The phenomenon, which affects up to 80 percent of the population who own smart phones or tablets, leads to feelings of sickness and unsteadiness. It is caused by seeing fast motion on a screen, which covers anything from a car chase in a film to scrolling through web pages on your phone. The more realistic the visual content appears to you, the higher your chances of getting cybersickness are . The condition was identified in a piece in the New York Times in which British and US experts said that it needed solving. Motion sickness leaves sufferers feeling ill because they feel movement in your muscles and your inner ear but do not see it. The mismatch in digital sickness is the opposite--you see movement on the screen but do not feel it. The effect is the same and the symptoms include a headache, wanting to throw up, confusion and the need to sit down. Often cybersickness shows itself in a subtle way and sufferers put it down to stress or eyestrain. Steven Rauch, a professor of otolaryngology at Harvard Medical School, said: "Your sense of balance is different from other senses in that it has lots of inputs. When those inputs don't agree, that's when you feel dizziness and sickness. " Some studies that have been carried out into cybersickness found that women are more _ than men, the New York Times reported. Those who have Type A' personalities--meaning they are confident and determined--are more likely to suffer from cybersickness as well. Among those who have reported experiencing the condition have been video gamers who spend hours playing fast paced games. Engineers at Oculus VR, the virtual headset manufacturer, have admitted that digital motion sickness is one of their biggest problems. Question: What's the difference between motion sickness and digital sickness? Options: A: Digital sickness means sufferers see movement but do not feel it. B: Digital sickness means sufferers feel movement but do not see it. C: Motion sickness means sufferers see movement but do not feel it. D: Motion sickness means sufferers don't see or feel movement
(Answer)
A

Read the article and select the best answer. Article: Some wonderfully creative uses of X-rays have been in the world of art.But the most impressive one is to uncover what has been covered up.Details unfolded by an X-ray of a painting can ' t be seen any other way.For example, in the past, paintings were often repaired if small pieces of paint fell off the canvas . These repairs cannot be seen just by looking at the painting.It takes an X-ray to discover where the repairs have been made. An X-ray of a painting is one of the best ways to tell if it was created by a famous painter or if it is a forgery .If there is a question as to whether an old master has painted a certain painting or not, X-rays are made and compared to those of paintings that are known to be original.If the brushstrokes , for example, are shown to be totally different than in other work done by a certain artist, then the painting is proved to be a fake copy. Since modern paints are usually made from different materials than paints of hundreds of years ago, the image they leave on an X-ray film looks different.This is another way X-rays can be used to spot a forgery.A modem artist will try to make a forgery look hundreds of years old by painting dirty varnish on it or by using artificial means to get the varnish to look cracked.To the naked eye the forgery may look old, but when a careful study of the X-ray image is made, the _ is obvious. It was common many years ago for an artist to finish a painting, decide it wasn't any good, and paint a completely different picture on top of it.Or artists would paint over others' work --it was their version of recycling.Taking an X-ray is the only way to find out if there is a picture underneath the picture you see with your eyes.Sometimes museums will be more interested in the painting beneath than the one on top, and will restore the older one by having the top layer painstakingly removed. Question: According to the passage,X-rays are used to _ . Options: A: make repairs on paintings in the past B: identify the authenticity of an artwork C: change the materials of a forgery D: remove the recyclable paints
B