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某松散岩体中有一隧道宽5．0m，高5.0m，围岩的等效内摩擦角为50°，重度为21kN／m3，按太沙基理论计算。

围岩垂直平均压力为（）。

A.56kPa

B.66kPa

C.76kPa

D.86kPa

答案

参考答案：C

单项选择题

在马尔西尼亚，古典唱片的销量急剧增加。这次销售强劲的买者是音乐方面的新手，他们要么被来自于电视广告的古典音乐所吸引，要么被电视上引入的重大体育盛事的主题曲所吸引。然而，马尔西尼亚的古典音乐会上的观众却持续下降。我们可以从这个事实得出结论：马尔西尼亚的古典音乐的新入道者由于最初欣赏古典音乐是通过唱片音乐的方式，所以很满意作为唱片音乐的古典音乐，并且实际上也没有听取现场表演的欲望。
以上结论依赖于下面哪个假设

A．古典唱片要想在马尔西尼亚畅销，它至少应包括一首来自电视的耳熟能详的音乐。

B．在马尔西尼亚古典唱片的购买者中，至少有一部分人能得到参加古典音乐会的赠券。

C．在马尔西尼亚上演的古典音乐会的数量并没有由于更少的观众而减少。

D．在马尔西尼亚可以得到的古典唱片绝大部分都不是现场音乐会的录音。
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单项选择题

Deflation is an economic theory relating changes in the price levels to changes in the quantity of money. In its developed (1) , it constitutes an analysis of the (2) underlying inflation and deflation. As (3) by the English philosopher John Locke in the 17th century, the Scottish (4) David Hume in the 18th century, and (5) , it was a weapon (6) the mercantilists, who were thought to equate wealth with money. If the (7) of money by a nation merely raised (8) , argued the quantity theorists, then a "favourable" balance of trade, (9) desired by mercantilists, would increase the supply of money but would not in-crease (10) . In the 19th century the quantity theory (11) to the ascendancy of free trade over protectionism. In the 19th and 20th centuries it played a part in the (12) of business cycles and in the theory of foreign (13) rates.

The (14) theory came under attack during the 1930s, (15) monetary expansion seemed ineffective in combating deflation. Economists argued that the levels of investment and government spending were more important than the money supply in determining economic activity.

The tide of opinion (16) again in the 1960s, when experience (17) post-World WarⅡ inflation and new empirical (18) of money and prices— (19) A Monetary History of the United States (1963) by Milton Friedman and Anna Schwartz—restored much of the quantity theory’ s lost prestige. One implication of this theory is that the size of the stock of money must be considered when shaping governmental policies (20) to control prices and maintain full employment.

5（）

A.others

B.the other

C.another

D.other
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