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. This passage is most probably _ . A) a science fiction B) a newspaper ad C) a book review D) a science news report
D
(Question)
Cotton farmers in some Indian villages are busily buying Coca-Cola and Pepsi, believing that the sugar in the fizzy( ) drinks kills pests. Farmers say scientists advised them to mix pesticides with a sugary juice to control pests, and they found the mixture cheaper and more effective than pure chemicals-- although soft drink makers and scientists dismissed the remarks. N. Hamunayya, who has become a famous person in his village in the southeastern state of Andhra Pradesh, said his crop survived an attack of pests which had resisted other pesticides. "We found that all the colas had uniform effect on pests. The pests became dead and fell to the ground, "he said. He said the drinks had all the elements they needed : they were cheaper, sticky, fizzy, and attracted ants, which ate the young of the pests. But Thinupathi Reddy, assistant director of the Regional Agri-Research Station, Guntur, says tests had proved such results wrong. "We conducted some field trials on cotton crop at our research station. There was no obvious productivity or destruction of pests, "he says. Statements from Pepsi and Coca-Cola said there was " no scientific basis" for _ . But their dealers are enjoying increasing sales. Mantan Wall, who sells soft drinks in 17 villages in the region, said sales rose up, thanks to the farmers. " For the 10 days between August and September I had successful business. Instead of just 30 cases( each containing a dozen one-litre bottles) of cola, I started selling almost 200 cases, "he said. " We expected the sales to drop after the news over pesticide residues( ) in the cola drinks. Now I have to keep extra supply for the cotton farmers, "he said. In February, an Indian environment group made a report saying drinks made by Coca-Cola and Pepsi contained pesticides and called for tougher safety standards. The U. S firms strongly rejected the findings of the New Delhi-based Centre for Science and Environment and said their products were safe. The writer' s purpose of writing this passage is to _ . A) tell an interesting incident B) warn people that some drinks might be dangerous to health C) suggest using Coca-Cola to kill pests. D) announce a new discovery of Coca-Cola
(Answer)
A
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. What are the advantages of smart credit cards over traditional ones? A) they can store more information B) they are more secure C) they are more convenient to use D) all of the above
D