问题 单项选择题

The United States is well-known for its network of major highways designed to help a driver get from one place to another in the shortest possible time. (51) these wide modern roads are generally smooth and well maintained, with (52) sharp curves and many straight sections, a direct route is not always the most (53) one. Large highways often pass by scenic areas and interesting small towns. Furthermore, these highways generally (54) large urban centers which means that they become crowded with heavy traffic during rush hours, (55) the "fast, direct" way becomes a very slow route.

However, there is almost always another route to take (56) you are not in a hurry. Not far from the (57) new "super highways", there are often older, less heavily traveled roads which go through the countryside. (58) of these are good two-lane roads; others are uneven roads curling through the country. These secondary routes may go up steep slopes, along high cliffs, or down frightening hillsides to towns (59) in deep valleys. Through these less direct routes, longer and slower, they generally go to place where the air is clean and the scenery is beautiful, and the driver may have a (60) to get a fresh, clean view of the world.

52().

A. little

B. few

C. much

D. many

答案

参考答案:B

解析:

从本句所讲的高速公路的特征可以看出,这些宽阔的现代化道路路面平坦,养护得很好,显然,急转弯(sharp curves)不会很多。因此应该选用一个表示否定意义的限定词,curves是可数名词,所以应该选B项few,意思是“很少,几乎没有”。

单项选择题
单项选择题

当你站在海边,望着一望无际的蔚蓝海水和一层一层涌向岸边的浪花,是否会有一种______舒畅、开阔、生气勃勃的感觉 俄罗斯生物物理学家阿拉巴特日独辟蹊径,观察研究了这一现象。他注意到,当海水在风力作用下形成海浪时,会产生人耳听不见的频率为8~13赫兹的次声波。该现象早已为人们所知晓。但是阿拉巴特日感兴趣的是,在我们人体内部究竟是什么东西能与来自大海的次声波频率相一致呢当他将注意力转向生物医学资料时,马上发现了自己想找的答案。原来,在人的大脑里存在各种不同的生物电流,它们可以通过脑电图被记录下来。科学家们对记录下来的脑电波进行了深入的研究和分类。已知的几种生物电流节律无论在频率上还是在强度上都有很大差别,其中一种节律的频率为8~13赫兹。真是惊人的巧合!也许,海洋次声波能在人的大脑里引起某种共振。节律能使人们表现出正常和精神饱满的状态。只要人稍微紧张、疲倦,节律便会减弱,这时大脑中具有其他频率的一些节律就会开始占上风。这是否意味着人类大脑中的天然节律具有某种对大海生活的遗传生理适应性呢或许这种遗传生理适应性正说明人类远古祖先起源于大海吧。阿拉巴特日认为,人为激发频率为8~13赫兹的次声波完全能使人处于并保持不眠状态。这也许是生理学上的又一新课题。

频率8~13赫兹的次声波产生的条件是()。

A.海水

B.风力

C.海岸

D.海浪