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问题 填空题

(1)请用下列10种物质的序号填空：①O2 ②H2 ③NH4NO3 ④K2O2 ⑤Ba(OH)2 ⑥CH4 ⑦CO2 ⑧NaF ⑨NH3　⑩I2，只含有极性键的是__________，既有离子键又有非极性键的是________；既有离子键又有极性键的是________。

(2)X、Y两种主族元素能形成XY2型化合物，已知XY2中共有38个电子，若XY2为常见元素形成的离子化合物，其电子式为：________；若XY2为共价化合物时，其结构式为：_________________。

(3)氯化铝的物理性质非常特殊，如：氯化铝的熔点为190℃(2.02×103Pa)，但在180℃就开始升华。据此判断，氯化铝是________(填“共价化合物”或“离子化合物”)，可以证明你的判断正确的实验依据是__________________。

(4)现有a～g 7种短周期元素，它们在周期表中的位置如下，请据此回答下列问题

①元素的原子间反应最容易形成离子键的是________(填序号，下同)，容易形成共价键的是________； A．c和f B．b和g C．d和g D．b和e

②写出a～g 7种元素形成的所有原子都满足最外层为8电子结构的任意一种分子的分子式_______。

答案

(1)⑥⑦⑨；④；③⑤

(2)

(3)共价化合物；氯化铝在熔融状态下不能导

(4)①B；C；②CCl4(或PCl3)

单项选择题

不属于推法的是（）

A.拇指推

B.肘推

C.掌推

D.食指推

E.拇指平推
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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.

11（）

A.accesses

B.contributed

C.pointed

D.explained
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