Farmers can produce more by planting several different crops in the same field.But their success depends on which crops they plant together and how they mix them in the filed.In the past, the only way the farmers could learn which crops grow best together is to plant them and wait for the results.Now, however, a computer can give them answers.A new computer program written by Dr John Vanderwell of Michigan University can tell a farmer which plants grow well together and which do not.It can tell him how to plant the different crops; if he should plant each in a separate row, or mix the crops in the same row.It can tell the farmer how changes in planting each of the crops will affect the production of all of them.And it can tell him which plants can help reduce losses from diseases. According to the passage, to get the best result, one needs to choose carefully _ . A) the kinds of crops to be planted together B) the way for different crops to be mixed C) both A and B D) either A or B
C
Some weight-loss camps, which are rare in China just a few years ago, have sprouted in Beijing, Qingdao, Shenzhen, and other cities. Today about 15 percent of adults, or 200 million Chinese, are reportedly overweight. Of these, 90 million--about 7 percent--are obese . Experts say the obesity epidemic is spreading to children, though more slowly than in adults. The trend, they say, will have a huge impact on the health of China's citizens and economy. "We're seeing a very large proportion of children and adolescents who are quite heavy and aren't moving much," said Barry Popkin, a nutrition professor. Popkin carries out an ongoing health-and-nutrition survey of 16,000 households in China. He says more kids today are overeating and putting on weight "quite quickly". In just ten years China's childhood obesity rate has doubled, with the greatest gains coming in urban areas. "In big cities it's a big problem." Some experts blame the extra fat on a range of factors, many of them tied to China's rapidly changing economy and culture. The diets of Chinese adults and children are far higher in calorie-laden meats, fish, eggs, dairy products, fats, and sugars than ever before. In addition, kids--especially city dwellers--are more sedentary today and spend more time indoors in front of homework, television, computer games, and the Internet. Shuwen Ng, a health economist, says that kids in China now have pocket money, and they spend a portion of it on junk food. Ng adds that advertising and peer groups influence kids' food choices. Certain foods, such as new candies or fast food, have attractive features. China's childhood obesity rate still lags that of the United States, where some 15 percent of kids are said to be obese. But the long-term effects are equally serious. What's the best title for the passage? A) Chinese Childhood Obesity Explosion B) Weight-loss Camps in China C) Obesity Explosion's Impacts On Chinese Economy D) Obesity Explosion In China And America
A
Q: The world is filled with smart, talented, educated and gifted people. We meet them every day. A few days ago, my car was not running well. I pulled it into a garage and the young mechanic had it fixed in just a few minutes. He knew what was wrong by simply listening to the engine. I was amazed. The sad truth is, great talent is not enough. I am constantly shocked at how little talented people earn. I heard the other day that less than 5 percent of Americans earn more than $100, 000 a year. A business consultant who specializes in the medical trade was telling me how many doctors and dentists struggle financially. It was this business consultant who gave me the phrase, "They are one skill away from great wealth." There is an old saying that goes, "Job means' just over broke ' ". And unfortunately, I would say that the saying applies to millions of people. Because school does not think financial intelligence is intelligence, most workers" _ ". They work and they pay the bills. Instead I recommend to young people to seek work for what they will learn, more than what they will earn. When I ask the classes I teach, "How many of you can cook a better hamburger than McDonald's?" almost all the students raise their hands. I then ask, "So if most of you can cook a better hamburger, how come McDonald's makes more money than you?" The answer is obvious: McDonald's is excellent at business systems. The reason so many talented people are poor is because they focus on bui1ding a better hamburger and know little or nothing about business systems. The world is filled with talented poor people. They focus on perfecting their skills at building a better hamburger rather than the skills of selling and delivering the hamburger. The main purpose of the author is to tell us _ . A) how young people can find a satisfactory job B) what schools should teach students C) why so many talented people are poor D) how McDonald's makes much money
A: C
Question: Howling is a behavior commonly observed among a wolf pack . As pack animals, wolves work together to hunt and rely on howling as an important means of communication among each other. There are different explanations of a wolf's howl and it appears that there may be more to discover. One theory is that wolves howl to bond better together. It's almost as if howling together helps the pack stay together, perhaps something similar to people feeling a sense of involvement with each other when singing a song together. But this theory may be wrong, explains Fred H. Harrington, a professor who studies wolf behavior. Indeed, there have been times when wolves have been seen one moment howling in a chorus, and the next, quarreling among each other. It appears that usually the lowest-ranking members of the pack may actually be "punished" for joining in the chorus at times. So is howling a way to strengthen a social bond or just a way to reconfirm status among its members? --Why do wolves howl for sure? What is clear, however, is that howling is often used among packmates to locate each other. Hunting grounds are distant and it happens that wolves may separate from one another at times. When this happens, howling appears to be an excellent means of gathering. Howling, interestingly, is a contagious behavior. When one wolf starts to howl, very likely others will follow. This is often seen to occur in the morning, as if wolves were doing some sort of "roll call" where wolves all howl together to report their presence. Why does Harrington think the "social bond" theory may be wrong? A) Wolves separate from each other after howling. B) Wolves tend to protect their hunting grounds. C) Wolves sometimes have quarrels after howling together. D) Wolves of low rank are encouraged to join in the chorus.
Answer: C
Q: Sydney Airport International Terminal--Arrivals Area Specialty Retail News link:Two separate News link stores cater to all your reading needs including newspapers.magazines and the latest best sellers. Downtown Duty Free:Make sure you shop at Downtown Duty Free for great saving on a range of items including perfume,alcohol,skincare and cigarettes.It's your last chance before customs! BEACH CULTURE:A must for those into the latest in beach clothing Top surf, street and fashion labels including Mambo,Stussy and Quicksilver, including children's sizes DINING BLUE Sky Cafe:Speedy service leaves you time to keep all eye on the arrivals gate Morning pastries.fresh juice.breakfast rolls and coffee while you wait. McDonald's:hamburgers,fries,drinks,muffins and shakes-all your family favorites.Breakfast served until 0:30 SERVICES ATM:ATMs are conveniently located throughout Arrival and Departures. Dollars. pounds. francs and RMB are all available. Vodafone Rentals:This communications center offers the very latest technology for mobile phone rentals.sales and servicing. Where is this passage likely to appear? A) An official guide B) A monthly magazine C) A geography book D) A morning newspaper
A: A