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问题 单项选择题

该图中能正确反映水库与度假村之间风向的是（）

A．①②

B．②③

C．①④

D．③④

答案

参考答案：D

解析：

热力环流的基本原理：热空气上升，冷空气下沉。白天水库气温应较周围地区低，故水库盛行下沉气流，近地面形成高压；度假村盛行上升气流，近地面形成低压，故近地面的风从水库吹向度假村，③正确；晚上水库气温应较周围地区高，故水库盛行上升气流，近地面形成低压；度假村盛行下沉气流，近地面形成高压，故近地面的风从度假村吹向水库，④正确；

考点：本题考查热力环流。

点评：本题解题关键掌握热力环流的基本原理：热空气上升，冷空气下沉。本题还可结合热力环流引起的等压面的弯曲设计试题。

多项选择题

二衬施工质量控制中，下列表述正确的有（）。

A.结构变形基本稳定的条件下施作

B.模板支架应预留沉降量

C.应从下向上浇筑，各部位应对称浇筑、振捣密实，且振捣器不得触及防水层

D.拆模时间应根据结构断面形式及混凝土达到的强度确定

E.减水型、缓凝型外加剂，其掺量应按设计要求确定
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单项选择题

In one sense, we can trace all the problems of the American city back (91) a single starting point: we Americans don’t like our cities very much.
That is, on the (92) of it, absurd. After all, more than three-fourths of us now live in cities, and more are (93) to them every year. We are told that the problems of our cities are (94) more attention in Washington, and scholarship has discovered a whole new (95) in urban studies.
(96) , it is historically true: in the American psychology, the city has been a basically suspect institution, (97) with the corruption of Europe, totally lacking that sense of spaciousness and innocence of the (98) and the rural landscape.
I don’t pretend to be a scholar on the history of the city in American life. But my thirteen years in public (99) , first as an officer of the U. S. Department of Justice, then as Congressman, and now as Mayor of the biggest city in America have taught me (100) too well the fact that a p antiurban attitude (101) consistently through the mainstream of American thinking. Much of the (102) behind the settlement of America was in reaction (103) the conditions in European industrial centers and much of the theory (104) the basis of freedom in America was linked directly to the availability of land and the perfectibility of man outside the corrupt influences of the city.
What has this to do with the predicament of the modern city I think it has (105) to do with it. For the fact is that the United States (106) the federal government, which has historically established our national priorities, has simply never thought that the American city was "worthy" of (107) —at least not to the (108) of expending any basic resources on it.
Antipathy to the city predates the American experience. When industrialization (109) the European working man into the major cities of the continent, books and pamphlets appeared (110) the city as a source of crime, corruption, filth, disease, vice, licentiousness, subversion, and high prices.

A．for

B．to

C．from

D．with
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