问题 单项选择题

阅读以下文字,完成以下问题。
激光具有双重“性格”:经实验,或表现为电磁波,或表现为能量粒子。这就像在不同的生活环境中,一个男人或者被看作丈夫,或者被看作父亲一样。
激光由粒子组成,它像一切波现象那样拥有频率和波长(两个相邻波峰间的距离)。激光是受激发射出的电磁波,它们的电磁波的波峰与激发它们的光波相一致。这种现象就提供了获得更大能量光束的可能性。
但激光并不是自然界惟一的、可以夸耀自己有双重性格的东西。原子,也就是物质化学变化中的最小微粒也具有同样的双重性格。如果延伸我们感官认知的物质世界而深入到原子世界,那么规律就改变了,传统的物理学就让位给了量子力学。1977年,麻省理工学院沃尔夫冈凯特勒领导的实验小组证实了爱因斯坦和他的印度同事波色于1924年提出的理论假设:在合适的条件下可使一群原子表现得像一个原子那样,只有一个波长和一个频率。这一群原子就成了超级原子。
这个被称为“波色一爱因斯坦凝聚”的超级原子是通过磁场诱捕一些钠原子而得到的,并使钠原子的温度达到百万分之几绝对温度(绝对零度为-273.15℃)。形成这种超低温状态之后,通过磁场干扰,使一些原子逃走,剩下冷凝的原子获得完全“同步”的原子的状态,它们的波峰完全一致,并一个一个地列队进行发射,这样就制成了一个“原子激光”。这是一个有些难以理解的概念,但可用一个比较把它[ ]化:即普通物质(现实世界的任何一种物质)和这种原子激光之间的区别,如同灯光的光(完全无秩序和能量很小的光)和传统激光装置发射的光(正是由于电磁波的同步性使光极强)之间的区别。原子激光目前还没有在工业上应用,但研究人员预计,原子激光首先应用于测量重力变化和制造纳米技术的新仪器。

文中[ ]应填入的词语是( )。

A.简明

B.简单

C.简洁

D.形象

答案

参考答案:A

单项选择题
阅读理解

In spite of the television and other ways to pass information, the newspaper is still an important source. Many people begin their day by reading the paper. In this way they learn what is going on in the world. Sometimes, however, they don’t have time to read the news carefully and must be satisfied with a quick look at the front page, at other times, they may be in such a hurry that they have time only for a glance at headlines.

In the United States there are newspapers to satisfy all kinds of readers. In big cities there are many types of papers, with several different editions(版本) every day. In the small towns there are fewer newspapers and perhaps only one edition each day. In some areas the paper is even printed weekly.

Another type of publications that help the population know what is happening in the world is magazines. Some magazines are published weekly, others are put out monthly. There are news magazines, and magazines for special interests as sports, photography and music. In the United States, you can find the right thing for every taste and interest.

小题1:In order to know what is happening in the world,          .

A.people should read the whole newspaper carefully

B.people should read a newspaper as the first thing in the morning

C.one should at least have a quick look at the headlines

D.one doesn’t have to read the front page小题2: In the United States,          .

A.people read more newspapers than in other countries

B.there are different newspapers even in a small town

C.people can read at least one newspaper each week

D.people spend a lot of time reading the Sunday section小题3: Magazines are          .

A.weekly or monthly newspapers

B.a kind of publications

C.special reading materials for fun

D.just like newspapers小题4:In the first paragrgh the underlined word “glance” probably means          .

A.quick look

B.quick movement

C.angry look

D.unpleasant look