试题与答案

发生康普顿效应时() A.光子与核外电子发生弹性碰撞,电子获得部分能量脱离原子,同时

题型:单项选择题 A型题

题目:

发生康普顿效应时()

A.光子与核外电子发生弹性碰撞,电子获得部分能量脱离原子,同时入射光子的能量与运动方向发生变化

B.光子与核外电子发生弹性碰撞,电子获得部分能量脱离原子,入射光子的能量与运动方向不发生变化

C.光子与核外电子发生非弹性碰撞,电子获得部分能量脱离原子,同时入射光子的能量与运动方向发生变化

D.光子与核外电子发生非弹性碰撞,电子获得部分能量脱离原子,入射光子的运动方向不发生变化

E.光子与核外电子发生非弹性碰撞,电子获得部分能量脱离原子,入射光子的能量不发生变化

答案:

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参考答案:A, B, C, E解析:本题考查信息化和工业化融合评估。"两化融合评估国家标准"将企业两化融合的发展分为起步建设、单项覆盖、集成提升、创新突破四个阶段。

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题型:单项选择题

Although "naming rights" have proliferated in American higher education for the past several decades, the phenomenon has recently expanded to extraordinary lengths. Anything to get an extra dollar out of donors is fair game. I know colleges and universities sorely need to raise funds in these times of fiscal constraints, but things have gotten a bit out of hand.

Universities and colleges have long been named after donors—think of Harvard, Yale, Brown, and many others. John Harvard would hardly get a bench named after him today, given the modesty of his gift of books for the library back in the seventeenth century. Now it takes much more to get one’s name on a college. One institution, Rowan University of New Jersey, changed its name (from Glassboro State College) not long ago when a large donation was made. Buildings, too, have been affected. Traditionally, they were named after people such as distinguished scholars or visionary academic leaders; now they’re often named after big donors.

Why is all of this happening now The main motivation for the naming frenzy is, of course, to raise money. Donors love to see their names, or the names of their parents or other relatives, on buildings, schools, institutions, professorships, and the like. Increasingly, corporations and other businesses also seek to benefit from having their names on educational facilities. Today, no limits seem to exist on what can be named. If something does not have a name, it is up for grabs—a staircase, a pond, or a parking garage. Once all the major facilities have titles, lesser things go on the naming auction block. Colleges and universities, public and private, are all under increased pressure to raise money, and naming brings in cash.

It is unproductive. Separate branding weakens the focus and mission of an institution and perhaps even its broader reputation. It confuses the public, including potential students, and feeds the idea that the twenty-first-century university is simply a confederation of independent entrepreneurial domains.

The trends we see now in the United States, and perhaps tomorrow in other countries, will inevitably weaken the concept of the university as an institution that is devoted to the search for truth and the transmission of knowledge. All this naming distracts from the mission of an institution that has almost a millennium of history and cheapens its image. It is a sad symbol indeed of the commercialization and entrepreneurialism of the contemporary university.

In the past, the buildings in universities were named after ().

A. political leaders

B. wealthy alumni

C. outstanding scholars

D. famous donors

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