试题与答案

如图是一些重要工业生产的转化关系(反应条件略去): 请完成下列问题: (1)若D

题型:填空题

题目:

如图是一些重要工业生产的转化关系(反应条件略去):

请完成下列问题:

(1)若D是单质,且与A属于同一主族,则.

①反应的化学方程式是______.

②D的原子结构示意图是______.

③D单质的一种重要用途是______.

(2)若B为黄色固体,D为固体化合物,则

①该反应的化学方程式是______.

②生产该工业品的工厂应建在离______较近的地方.

③实验室检验C的方法是______.

(3)若B是一种有刺激性气味的气体,则

①B的分子形状是______.

②实验室进行此实验时,常看到有大量白烟产生,请说明产生大量白烟的原因______.

③化合物C在一定体积的容器中,在一定条件下发生反应,测得容器内气体的压强略小于原来的

2
3
,请写出该反应的化学方程式______.

答案:

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题型:单项选择题

人格障碍的共同特征中,关于社会适应的描述,正确的是()

A.人格显著的、持久的偏离了所处社会文化环境应有的范围,并形成与众不同的行为模式

B.人格暂时偏离了所处社会文化环境应有的范围,但行为模式没有明显改变

C.虽然人格显著的、持久的偏离了所处社会文化环境应有的范围,但行为模式没有明显改变

D.虽然人格未偏离所在社会文化环境应有的范围,但行为模式有明显的改变

E.以上都不对

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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.

The word "constraints" underlined in Paragraph 1 is closest in meaning to ______.

A.restraint

B.limitation

C.confinement

D.strain

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