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问题 选择题

读“我国沿32°N地形剖面图（下图）”，我国地势的主要特征是（　　）

A．我国地势东高西低，呈阶梯状分布

B．我国地势西高东低，呈阶梯状分布

C．我国地势南高北低，呈阶梯状分布

D．我国地势北高南低，呈阶梯状分布

答案

观察剖面图可知，地势西高东低，呈阶梯状分布．故选项B符合题意；选项A、C、D不符合题意．

故选：B．

选择题

下列关于摩擦力的说法中正确的是（　　）

A．摩擦力的方向一定与运动方向相反

B．摩擦力的方向一定与运动方向相同

C．静止的物体也可能受滑动摩擦力的作用

D．静摩擦力的大小跟接触面的正压力成正比
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单项选择题

The "standard of living" of any country means the average person’s share of the goods and services which the country produces. A country’s standard of living, (1) , depends first and (2) on its capacity to produce wealth." Wealth" in this sense is not money, for we do not live on money (3) on things that money can buy. "Goods" such as food and clothing, and "services" such as transport and " (4) ". A country’s capacity to produce wealth depends upon many factors, most of (5) have an effect on one another. Wealth depends (6) a great extent upon a country’s natural resources. Some regions of the world are well supplied with coal and minerals, and have a fertile soil and a (7) climate; other regions possess none of them.

Next to natural resources (8) the ability to turn them to use. China is perhaps as well (9) as the USA in natural resources, but suffered for many years from civil and (10) wars, and (11) this and other reasons was (12) to develop her resources. (13) and stable political conditions, and (14) from foreign invasion, enable a country to develop its natural resources peacefully and steadily, and to produce more wealth than another country equally well (15) by nature but less well ordered.

A country’s standard of living does not only depend upon the wealth that is produced and consumed (16) its own borders, but also upon what is indirectly produced through international trade. (17) , Britain’s wealth in foodstuffs and other agricultural products would be much less if she had to depend only on (18) grown at home. Trade makes it possible for her surplus manufactured goods to be traded abroad for the agricultural products that would (19) be lacking. A country’s wealth is, therefore, much influenced by its manufacturing capacity, (20) that other countries can be found ready to accept its manufactures.

5（）

A.it

B.them

C.which

D.that
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