题目内容
It is wise to remember that you do not have to buy anything from any salesperson. You ought to buy only those things you really need or want and can（1）. Try not to let your personal feelings about the salesperson（2） you to make a purchase. Remember that you are entitled to ask a salesperson any question you wish （3） the product or service, and you are entitled to get a clear, complete（4）. You call tell the salesperson you want to think about the matter, for a few days, （5） that you want to talk to other people who have purchased the product or service. You can walk（6） from a salesperson without a polite end to the conversation. If a salesperson telephones you, you do not have to listen to the person’s entire "lecture" or respond to it in a friendly way. You can simply interrupt the person and state that you are not interested in the product or service. You can simply（7） the telephone without saying anything.There are, of course, many salespeople who are genuinely interested in assisting you and in （8） you reasonable products and prices. If you are in （9） about the wisdom of a particular purchase, you might want to（10）another person who has had experience with the product or the service that interests you. If you receive unwanted goods in the mail, you are not obligated to pay for it. （） that you want to talk to other people who have purchased the product or service.
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The night is not what it was. Once, the Earth was cast half in shadow. Then came fire, candle, and light bulb, gradually drawing back the curtain of darkness. But a brighter world has its drawbacks.An estimated 30 percent of outdoor lighting--plus even some indoor lighting--is wasted. Inefficient lighting costs U. S. about ＄10.4 billion a year, according to Bob Gent of the International Dark-Sky Association, a nonprofit that aims to control light pollution.Last year in Sydney, an estimated 2.2 million Australians switched off their lights during "Earth Hour", briefly reducing that city’s energy use by more than 10 percent. Motivated by such trends, more than two dozen cities worldwide went dim on March 29 this year in an hour-long demonstration.A number of groups are trying to measure light pollution and assess its effects on the environment in the hope that people will reduce their own contribution to the problem. Scientists aye trying to report how many stars we can see. In dark rural areas, about 2,000 stars are typically visible at night, compared with "maybe five" in a bright city square--and about 5,000 in centuries past.People who are working while others are star-gazing may face the greatest risks. Nighttime exposure to white light can cause the growth of tumors (肿瘤), experiments show. Two decades of research indicate that women who work night shifts have unusually high rates of breast cancer. People who work at night （）
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童年期儿童心理发展的特点表明，小学生记忆的主要方式是（）记忆。
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