请阅读Passage l，完成第小题。Passage 1Move over Methuselah. Future generations could be living well into their second century and still doing Sudoku, if life expectancy predictions are true. Increasing by two y

A．Last week． B．Three’weeks ago． C．Two months ago． D．Three years ago．

【题目描述】 ● 在Excel中， A1单元格中的值为57.25，在 B1单元格中输入函数“=ROUND （A1， 0） ” ，按回车键后，B1单元格中的值为 （54） 。 （54） A.57 B.57.3 C.57.25 D.57.250 <table><tbody><tr><td>【我提交的答案】： A</td></tr><tr><td>【参考答案与解析】： 正确答案：A</td></tr></tbody></table>答案分析： 【我的疑问】（如下，请求专家帮助解答） 我想知道这道题的原理

是 否

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 a 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 involves 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. 31. We learn from the first paragraph that ________. A) offering senior citizens discounts has become routine commercial practice B) senior citizen discounts have enabled many old people to live a decent life C) giving senior citizens discounts has boosted the market for the elderly D) senior citizens have to show their birth certificates to get a discount

Passage 1 They came to the United States as children with little idea， if any， of what it meant to overstay a visa. They enrolled in public schools， learned English， earned high school diplomas. Like many of their classmates， they pondered college choices. But as undocumented immigrants in Maryland， they then had to confront the reality that they must pay two to three times what former high school classmates pay to attend the state"s public colleges. It is a rule that， for many students of modest means， puts a college education out of reach， with one exception : Montgomery College. That is why Josue Aguiluz， 21， born in Honduras， and Ricardo Campos， 23， born in E1 Salvador——and numerous others like them——landed at the community college. There， they study and wait for a verdict from Maryland voters on a Nov. 6 ballot measure that may determine whether they can afford to advance to a four-year college. "I know people in Maryland believe in education，" Campos said the other day at the student center on the Rockville campus. "I know they are going to vote for Question 4. I"m hanging on their vote." Question 4 asks voters to affirm or strike down a law that the legislature passed last year，known as Maryland"s version of the "Dream Act，" which granted certain undocumented immigrants the ability to obtain in-state tuition at public colleges and universities. The subsidy comes with conditions. Among them: To take advantage， students must first go to a two-year community college. The law was pushed to a referendum after opponents mounted a lightning petition drive that showed the depth of division over illegal immigration across the state and the nation. Critics say discounting tuition for students who lack permission to be in the country is an unjustified giveaway of what they believe will amount to tens of millions of tax dollars a year. "When an undocumented student enters the system， it is a net loss of revenue，" said Del. Patrick L. McDonough. "It is a simple mathematical argument. Put your emotion and your passion aside， and get out your calculator." There is no count of the number of students statewide who would be eligible for benefits under the law. Estimates range from several hundred to a few thousand. A Washington Post poll this month found that a solid majority of likely voters favored the law: 59 percent support it， and 35 percent are opposed. If the law is affirmed， Maryland would join about a dozen other states with laws or policies providing in-state tuition benefits to undocumented immigrants. Texas became the first in 2001. Experts say Maryland"s version is the only one that requires students to go through community college first. That means the state"s 16 community colleges could become a pipeline for undocumented students in public higher education if the measure is approved. Montgomery College is already a magnet for such students. It offers the same low tuition to any student who graduated within the past three years from a Montgomery County high school. What reality did the undocumented immigrants in Maryland have to confront？ 查看材料 A.It is impossible for them to get college education. B.They cannot afford to study in Montgomery College. C.They must pay more tuition than their peers to get high school diplomas. D.They must pay more tuition than their peers at the state"s public colleges.

A．Subjective. B．Neutral. C．Pessimistic. D．Active.

Modern scientists divide the process of dying into two stages--clinical or temporary death and biological death. Clinical death occurs when the vital organs, such as the heart or A、the difference between biological and clinical death B、the process of dying C、prolonging the period of clinical death D、the nature of clinical death

A、joint interest B、different points of view C、less emotional people D、advanced technology

A、Group work gives pupils the opportunity to learn to work together with others. B、Pupils also learn to develop their reasoning abilities. C、Group work provides pupils with the opportunity to learn to be capable organizers. D、Pupils also learn how to participate in teaching activities.

A、Toxoplasma gondii causes people strange and deadly diseases. B、With certain infection the infectious disease cannot be cured completely. C、Human beings infected by toxoplasma gondii will have permanent brain damage. D、Toxoplasma gondii is harmful to human beings, but it does no harm to mice.