Article: Girls really prefer pink and boys prefer blue, recent research shows. The reasons could have its origins in the hunt for food on the African savannah thousands of years ago. Evolution may have developed women's preference for pink, perhaps because it helped to find ripe fruit and healthy men with reddish faces, while both men and women have a natural desire for blue, according to scientists at prefix = st1 /NewcastleUniversity. " Everyone in today's western culture, from parents to toy manufactures, seems to assume that little girls like pink." Said Prof. Anya Hulbert, who wanted to find out whether the reason was cultural or to do with biology. A love of salmon, _ and coral does seem to be rooted into females, rather than picked up from their mothers. The participants in the study were Chinese and British. The Chinese students showed a marked preference for red, " Culture may contribute to this natural female preference," said Pro. Hulbert. In her experience, 208 young adult men and women were asked to select, as rapidly as possible, their preferred color1. Hulbert and her colleague Dr. Yazhu Ling marked the results and found that while men preferred blue, women tended to choose pink. Hulbert said she could only prefer about the preference for blue: " Here again, I would favor evolutionary arguments. Going back to our savannah days, we would have a natural preference for a clear blue sky, because it signaled good weather. Clear blue also signals a good water source." Question: By saying " the Chinese students for red." In Para. 5, the writer means _ . Yes or no, is the answer "culture influences people's color1 preferences"?
No

Article: Many people say they can not start their day without first having a cup of coffee or tea.People say these drinks help them think clearly and feel more awake.This is because of caffeine,a kind of matter found in some plants.Caffeine helps to give a jumpstart to the nervous system.Now a new report says it may also improve long-term memory. Michael Yassa is a neurobiology professor at the University of California.He and other researchers wanted to know if caffeine could improve what they called memory consolidation.They asked a group of individuals to learn something new,then the same people were given caffeine,the active component in coffee,tea and chocolate. He and the other researchers worked with a group of l60 people who were Caffeinefree.On the first day,all the subjects were shown pictures of everyday objects.They were asked to identify whether the pictures could be found inside the house or outdoors.Some of the subjects were then given a caffeine pill,the others were given a placebo--a pill containing an inactive thing.On the second day,all of the subjects were asked to look at more pictures.Some of the images were exactly like the ones they had seen 24 hours early.But other images were different.And a third group of pictures was similar to the first group but a little different.The participants had to decide whether the images they saw were the same or different from the ones on the first day. Professor Yassa says their answers help to show the effects of caffeine on memory.He says those who took the caffeine pills had a ten to twelve percent increase in their ability to remember the objects.The amount of caffeine the researchers used in the study was similar to one strong cup of coffee. Professor Yassa says pills with a little more caffene also increased memory,but resulted in some participants appearing more nervous. Question: What does this text mainly tell us? Yes or no, is the answer "Caffeine may help better long-term memory."?
No

Q: Article: Do you remember the good old days? Innocent times spent sharing documents and executable files without a care in the world. Okay, every month or so you might encounter a boot sector virus -- but they were easy to deal with even if the anti-virus software didn't pick them up. But those long lazy summers disappeared too fast. Macro viruses made Information Technology (IT) administrators grow up fast as they realized there was a type of virus which could spread very quickly throughout an organization. It wasn't unusual to find hundreds of computers within personal company infected by viruses transmitted via email attachments. The IT staff were amongst the fittest departments in your company, running from Personal Computer (PC) to the next cleaning them up. There had to be a better way. Companies now realize that viruses aren't "urban myths", and can have a serious impact on their operations. They invest in anti-virus software on the desktops, servers and email gateways and even put in place procedures to ensure their anti-virus is up-to-date with the very latest detection routines. It sounds like companies have put in place adequate defenses to protect against viruses. But have they? Anti-virus software detects most of the viruses your users are likely to encounter -- often without the user even knowing. However, the software must be updated regularly, preferably daily in any large company. Even then, a very new virus can infect your users. With the rapid transmission of files through networks and the Internet, a virus can spread a considerable distance before it can be identified and protected against. Fortunately, only a few viruses ever do this but the likes of Melissa and the Love Bug can inflict serious damage before their progress is stopped. While employees become suddenly aware during the ensuing media excitement, they soon forget about the virus threat as the stories disappear from the news headlines. This is the danger. Complacency can set in when there is no perceived "action"... Question: Which of the following best summarizes the main idea of the passage? Yes or no, is the answer "Employees should be constantly warned about virus threats to ensure the normal functioning of the company's computer system."?
A: No

Q: Article: The Royal Commission on Environmental Pollution has just published a report on new materials and has looked at the case of nanotechnology , which describes the science of the very small. Nanotechnology covers those man-made materials or objects that are about a thousand times smaller than the microtechnology we use, such as the silicon chips of computers. Nanotechnology gets its name from the nanometer, which is a billionth of a meter. There are about 600 consumer products already on the market that use nanotechnology. Nanomedicine is also being developed to fight cancer and other fatal diseases. The Royal Commission found no evidence of harm to health or the environment from nanomaterials, but this "absence of evidence" is not being taken as "evidence of absence". In other words, just because there are no apparent problems, this is not to say that here is no risk now or in the future. The commission is concerned about the pace at which we are inventing and adopting new nanomaterials, which could result in future problems that we are ill-equipped to understand or even find with current testing methods. One of the problems about nanotechnology is that when we make something very small out of a well known material, we may actually change the functionality of that material even if the chemical composition remains the same. Indeed, it is not the particle size that should concern us, but its functionality. Take gold, for example, which is a famously inert substance, and valuable because of it. It doesn't rust or corrode because it doesn't interact with water or oxygen. However, a particle of gold that is between 2 and 5 nanometers in diameter becomes highly reactive. This is not due to a change in chemical composition, but because of a change in the physical size of the gold particles. How can a change in size result in a change of function? One reason is to do with surface area. Nanoparticles have relatively a much bigger surface area. It is like comparing the surface area of a basketball with the total surface... Question: Which process explains that there might be risks in nanotechnology? Yes or no, is the answer "expand surface area -increase interactivity - change functionality-cause possible dangers"?
A: Yes