如图所示，作用在物体上的同一平面内的四个共点力合力为零，若其中F2、F3、F4大

承包商在合同谈判时明确安全施工相关内容的意义在于（）

A.矿业工程项目属于高危行业

B.矿业工程的安全事故往往较严重

C.施工发生安全事故往往与发包方无关

D.项目应随时接受相关部门安全检查

E.安全施工是矿业工程队项目考核的重要指标

B

America has long been considered the land of opportunity(机遇)by those from other countries. Americans, too, believe that the United States gives almost limitless opportunities for those who want to open business on their own.

Today, Americans are still fond of trying their hand at becoming small business people, even though only one out of two survives in the first two years. Many of these people start their business for the wrong reason; to get away from the paper work of their present jobs or to exchange the responsibility(责任) of their present jobs for freer life styles. But more, not less paper work and responsibility come with the ownership of a small business.

Not all small businesses succeed. Fifty percent of the 4 550 000 that start in the United States ever fail. Still ninety-five percent of businesses in the U.S. can be regarded as small, and these businesses altogether produce forty percent of America’s total national products.

60．According to the passage, which of the following statements is true?

A．People from other countries and Americans think there are a lot of opportunities in the U.S.

B．Only the Americans think the U.S. can give them many opportunities.

C．Both people from other countries and Americans believe they have many opportunities in the U.S so that they can do whatever they like.

D．People from other countries and Americans all think the U.S. the place where they can realize their dreams.

61．From this passage, we know that________.

A．many people from other countries think that in the past there were many opportunities in the U.S. but not now

B．now Americans don’t believe the U.S. can give them a lot of opportunities

C．people from other countries still think they have more opportunities in the U.S. than in their own countries

D．Americans think they have more opportunities to start their own business than those from other countries

62．According to this passage, many American people like to start their own business because___.

A．they want to become rich soon

B．they not only dislike their present jobs but also want a freer life style

C．they don’t want to do paper work

D．they want to have more chances

63．From this passage, we can get the idea that________.

A．it is easy to do business successfully in the U.S

B．it is easy to start a business but hard to make it successful

C．there are more big business than small business in the U.S

D．only big business can succeed in the U.S

在前苏格拉底时代，很多哲学家都是自然科学家。

行政决策体制

在报表的“设计”视图中，区段被表示成带状形式，称为( )。

A．主体

B．节

C．主体节

D．分细