若金属锰（Mn）在金属活动性顺序中位于铝和锌之间，则下列反应不正确的是（ ） A

[A] Human history contains great stories that can help us appreciate more about past life.
[B] The great achievement can provide motivation for learners.
[C] Making us more human, more than anything else, is the purpose of studying history.
[D] Learning history can lead a more colorful life.
[E] History can tell us when we should give up.
[F] History can teach us a lesson from its mistakes.
The speaker alleges that studying history is valuable only insofar as it is relevant to our daily lives. I find this allegation to be specious. It wrongly suggests that history is not otherwise instructive and that its relevance to our everyday lives is limited. To the contrary, studying history provides inspiration, innumerable lessons for living, and useful valueclarification and perspective—all of which help us decide how to live our lives.
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To begin with, learning about great human achievements of the past provides inspiration. For example, a student inspired by the courage and tenacity of history’s great explorers might decide as a result to pursue a career in archeology, oceanography, or astronomy. This decision can, in turn, profoundly affect that student’s everyday life—in school and beyond. Even for students not inclined to pursue these sorts of careers, studying historical examples of courage in the face of adversity can provide motivation to face their own personal fears in life. In short, learning about grand accomplishments of the past can help us get through the everyday business of living, whatever that business might be, by emboldening us and lifting our spirits.
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In addition, mistakes of the past can teach us as a society how to avoid repeating those mistakes. For example, history can teach us the inappropriateness of addressing certain social issues, particularly moral ones, on a societal level. Attempts to legislate morality invariably fail, as aptly illustrated by the Prohibition experiment in the U.S. during the 1930s. Hopefully, as a society we can apply this lesson by adopting a more enlightened legislative approach toward such issues as free speech, criminalization of drug use, criminal justice, and equal rights under the law.
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Studying human history can also help us understand and appreciate the mores, values, and ideals of past cultures. A heightened awareness of cultural evolution, in turn, helps us formulate informed and reflective values and ideals for ourselves. Based on these values and ideals, students can determine their authentic life path as well as how they should allot their time and interact with others on a day-to-day basis.
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Finally, it might be tempting to imply from the speaker’s allegation that studying history has little relevance even for the mundane chores that occupy so much of our time each day, and therefore is of little value. However, from history we learn not to take everyday activities and things for granted. By understanding the history of money and banking we can transform an otherwise routine trip to the bank into an enlightened experience, or a visit to the grocery store into an homage to the many inventors, scientists, engineers, and entrepreneurs of the past who have made such convenience possible today. And, we can fully appreciate our freedom to go about our daffy lives largely as we choose only by understanding our political heritage. In short, appreciating history can serve to elevate our everyday chores to richer, more interesting, and more enjoyable experiences.
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In sum, the speaker fails to recognize that in all our activities and decisions--from our grandest to our most rote--history can inspire, inform, guide, and nurture. In the final analysis, to study history is to gain the capacity to be more human--and I would be hard- pressed to imagine a worthier end.

某中年男患者因心脏病发作被送到急诊室，症状及检查结果均明确提示心肌梗死。患者此时很清醒，但由于费用等原因，患者拒绝住院，坚持回家。此时医生应该（）。

A.尊重患者自主权，同意他回家，医生无任何责任

B.尊重患者自主权，但应尽力劝导患者住院，无效时办好相关手续

C.尊重患者自主权，但应尽力劝导患者住院，无效时行使干涉权

D.行使医生自主权，为救治患者强行留患者住院

E.行使医生特殊干涉权，强行把患者留在医院

满堂脚手架的水平剪刀撑宽度应为（）。

A、3~5m

B、4~6m

C、5~8m

D、6~8m

水流指示器的安装应在管道（）进行。

A、试压后，冲洗前

B、冲洗后，试压前

C、试压和冲洗合格后

D、试压和冲洗前

取浓度相同的NaOH和HCl溶液，以3∶2 体积比相混合，所得溶液的pH=12，则原溶液的浓度为 [ ]

A．0.01 mol/L    

B．0.017 mol/L      

C．0.05 mol/L    

D．0.50 mol/L