15．A computer program has beaten a human champion at the ancient Chinese board gameGo．It marked an i——青夏教育精英家教网—

Heat During Cooking	Oil	Best Use
Low to Moderate	Coconut	Baking （low heat ） Light Sauteing Pressure Cooking Salads
	Corn
	Olive
	Peanut
	Sesame
	Walnut
Medium Heat	Macadamia Nut	Baking Sauteing Stir-Frying
	Safflower
High Heat	Grape-seed	Deep Browning Deep-Frying
	Sunflower
	Soybean/Soy

Note that the above table represents oils that are refined（精炼的）．Most oils we buy are refined．Refined oils tend to have much higher smoke points than when they are unrefined．They also differ in nutrition and flavor．Unrefined oils are more nutritious and they tend to be much richer in flavor．
When it comes to extremely high heat cooking，always choose oils which are refined．

62．What determines whether an oil is healthy or not？D
A．Whether it's refined or not．
B．Its smoke point．
C．Its molecular．
D．How you use it．
63．Which of the following might be a better choice to make a healthy salad？C
A．Refined walnut oil．    B．Safflower oil．
C．Unrefined olive oil．   D．Sunflower oil．
64．Healthy oil can become unhealthy if．Baccording to the passage．
A．you keep it for too long
B．it is heated well beyond its smoke point
C．it is refined
D．its flavor is changed
65．The author wants to tell readers thatC．
A．oils are related to health
B．oils'value depends on their smoke points
C．"certain oils are healthier"is relative
D．oils'flavor and nutrition are connected．

7．In the past decade the popularity of rock climbing has greatly increased，and so has the number of injuries．It has been estimated that rock climbing is now enjoyed by more than 9million people in the US each year．Study findings revealed a 65percent increase in the number of patients that were treated in US emergency departments for rock climbingrelated injuries between 1991and 2008．
The study，published in the online issue of the American Journal of Preventive Medicine，found that about 40，000patients were treated in US emergency departments for rock climbingrelated injuries between 1991and 2008．The most common types of rock climbingrelated injuries were fractures （骨折） and sprains （扭伤）．The ankle was the most common body part to be injured （40percent）．Climbers in the study ranged in age from 2to 74，with an average age of 26．The study also found that women took up a quarter of the injuries．
Falls were the primary reason for injury with over threequarters of the injuries occurring as the result of a fall．The severity of fallrelated injuries had a lot to do with the height of the fall．Patients who were injured after falling from a height over 20feet were 10times more likely to be treated than patients who were injured falling from 20feet or lower．
"We found that the climbers who fell from heights higher than 20 feet took up 70 percent of the patients treated for a rock climbingrelated injury，"explained the study author Lara McKenzie，PhD，director at the Center for Injury Research and Policy at Nationwide Hospital．"This trend，combined with the fact that rock climbers have a higher hospitalization rate than other sports and recreational injuries，demonstrates the need to increase injury prevention efforts for climbers．"

26．Which body part is most likely to get injured for a climber？B
A．The arm． B．The ankle． C．The knee． D．The hand．
27．How many women climbers in America got injured while climbing a rock between 1991and 2008？D
A．About 40，000． B．About 30，000．
C．About 20，000． D．About 10，000．
28．The severity of climbers'fallrelated injures is mainly related toA．
A．the height of the fall             B．the climber's age
C．the climber's health conditions    D．the climber's climbing experience
29．The underlined word"demonstrates"in the last paragraph can be replaced by"C"．
A．demands              B．prevents
C．proves               D．describes
30．The purpose of the passage is toA．
A．show that rock climbingrelated injuries have increased
B．tell readers rock climbing is an adventurous sport
C．warn readers of the danger of rock climbing
D．call on doctors to increase injury prevention efforts．

6．The Diet Zone：A Dangerous Place
Diet Coke，diet Pepsi，diet pills，no-fat diet，vegetable diet．We are surrounded by the word"diet"everywhere we look and listen．We have so easily been attracted by the promise and potential of diet products that we have stopped thinking about what diet products are doing to us．We are paying for products that harm us psychologically and physically．
Diet products weaken us psychologically．On one level，we are not allowing our brain to admit that our weight problems lie not in actually losing the weight，but in controlling the consumption of fatty，high-calorie，unhealthy foods．Diet products allow us to jump over the thinking stage and go straight for the scale instead．All we have to do is to swallow or recognize the word"diet"in food labels．
On another level，diet products have greater psychological effects．Every time we have a zero-calorie drink，we are telling oursel ves without our awareness that we don't have to work to get results．Diet products make people believe that gain comes without pain，and that life can be without resistance and struggle．
The danger of diet products lies not only in the psychological effects they have on us，but also in the physical harm they cause．Diet foods can indirectly harm our bodies because consuming them instead of healthy foods means we are preventing our bodies from having basic nutrients．Diet foods and diet pills contain zero calorie only because the diet industry has created chemicals to produce these wonder products．Diet products may not be nutritional，and the chemicals that go into diet products are potentially dangerous．
Now that we are aware of the effects that diet products have on us，it is time to seriously think about buying them．Losing weight lies in the power of minds，not in the power of chemicals．Once we realize this，we will be much better able to resist diet products，and therefore prevent the psychological harm that comes from using them．

65．From Paragraph 1，we learn thatC．
A．diet products fail to bring out people's potential
B．people have difficulty in choosing diet products
C．diet products are misleading people
D．people are fed up with diet products
66．One psychological effect of diet products is that people tend toD．
A．try out a variety of diet foods
B．hesitate before they enjoy diet foods
C．pay attention to their own eating habits
D．watch their weight rather than their diet
67．In Paragraph 3，"gain comes without pain"probably meansA．
A．losing weight is effortless                B．it costs a lot to lose weight
C．diet products bring no pain                D．diet products are free from calories
68．Diet products indirectly harm people physically because such productsB．
A．are over-consumed                                B．lack basic nutrients
C．are short of chemicals                           D．provide too much energy．

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