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问题 选择题

可逆反应2A（g）+B（g）⇌2C（g），根据下表中的数据判断下列图象错误的是（　　）

压强\A转化率\温度p1（MPa）p2（MPa）
400℃99.699.7
500℃96.997.8

A．

B．

C．

D．

答案

由表中数据可知，在相同压强下，升高温度，A的转化率降低，说明升高温度平衡向逆反应方向移动，则正反应为放热反应，在相同温度下，增大压强，A的转化率增大，说明平衡向正反应方向移动，则

A．升高温度，A的转化率降低，与表中数据吻合，故A正确；

B．升高温度，平衡向逆反应方向移动，C的百分含量降低，增大压强，平衡向正反应方向移动，C的百分含量增大，与表中数据吻合，故B正确；

C．升高，反应速率增大，平衡向逆反应方向移动，逆反应速率大于正反应速率，与表中数据吻合，故C正确；

D．增大压强，反应速率增大，正反应速率大于逆反应速率平衡向正反应方向移动，图象与表中数据不吻合，故D错误．

故选D．

单项选择题

衬里管包括（）管。

A、橡胶

B、铸铁

C、无缝钢

D、渗铝
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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.

16（）

A.reversed

B.occurred

C.emerged

D.finished
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