题目

黄河是我们的母亲河，某化学小组的同学经过调查和搜集资料得知，通过①絮凝沉降（加明矾）；②杀菌消毒（通入氯气）；③自然沉降；④过滤等几个步骤对黄河水进行净化，合理的操作顺序是（     ）    A.①③②④   B.③①④② C.③④①②   D.①③④② 答案：B 请认真阅读下列短文，并根据所读内容在文章后表格中的空格里填入一个最恰当的单词。注意：每个空格只填1个单词。Age has its privileges in America, and one of the more prominent of them is the senior citizen discount. Anyone who has reached a certain age — in some cases as low as 55 — is automatically entitled to dazzling array of price reductions at nearly every level of commercial life. Eligibility is determined not by one’s need but by the date on one’s birth certificate. Practically unheard of a generation ago, the discounts have become a routine part of many businesses — as common as color televisions in motel rooms and free coffee on airliners.People with gray hair often are given the discounts without even asking for them; yet, millions of Americans above age 60 are healthy and solvent(有支付能力的). Businesses that would never dare offer discounts to college students or anyone under 30 freely offer them to older Americans. The practice is acceptable because of the widespread belief that “elderly” and “needy” are synonymous (同义的). Perhaps that once was true, but today elderly Americans as a group have a lower poverty rate than the rest of the population. To be sure, there is economic diversity within the elderly, and many older Americans are poor. But most of them aren’t.It is impossible to determine the impact of the discounts on individual companies. For many firms, they are a stimulus to revenue. But in other cases the discounts are given at the expense, directly or indirectly, of younger Americans. Moreover, they are a direct irritant in what some politicians and scholars see as a coming conflict between the generations.Generational tensions are being fueled by continuing debate over Social Security benefits, which mostly involve a transfer of resources from the young to the old. Employment is another sore point. Buoyed (支持) by laws and court decisions, more and more older Americans are declining the retirement dinner in favor of staying on the job — thereby lessening employment and promotion opportunities for younger workers.Far from a kind of charity they once were, senior citizen discounts have become a formidable economic privilege to a group with millions of members who don’t need them.It no longer makes sense to treat the elderly as a single group whose economic needs deserve priority over those of others. Senior citizen discounts only enhance the myth that older people can’t take care of themselves and need special treatment; and they threaten the creation of a new myth, that the elderly are ungrateful and taking for themselves at the expense of children and other age groups. Senior citizen discounts are the essence of the very thing older Americans are fighting against — discrimination by age.OutlineDetailsIntroductionAge determines whether an American can be given a discount, which is a common 【1】________________in American business life today.Origin of senior citizen discount●Since the senior citizens are often treated as people who are in 【2】____________, they are given such priority.【3】__________situation●The situation has changed a lot where the majority of the elderly are not poor at all.●Younger Americans were at a/an 【4】__________ directly or indirectly due to the discounts given to the elderly, thus leading to conflicts between generations.●The number of older Americans 【5】___________ to work rather than retire is on the increase, which means 【6】__________ opportunities for young workers.●It is no longer a kind of charity because millions of senior citizens don’t need the priority 【7】__________.ConclusionIt’s unwise to offer discount priority to the elderly.●It will mislead people to think they are unable to 【8】_____________ to themselves.●People may think that they are ungrateful and they’re hurting the 【9】_____________ of other age groups.●Actually senior citizen discounts, to some extent, 【10】___________against their age.