地极公司(Lands’End)成功的部分原因在于它能从国外制造商那里进口低成本的服装。此题为判断题(对，错)。

Which paragraph in the following is more coherent？

A、Nauru is so small that the plane lands in what is best described as the capital's main street. To stop cars when planes are landing the seaward side of the runway has traffic lights at each end. Well-fed and brightly clothed Naurans cowd the tiny air terminal with their smart cars. The only hotel, the luxurious Menen, is a 10-minute drive half way round the island and is where new arrivals are driven off in Japanese minibuses. The well-paved road passes rows of neat, modern houses, set among the trees.

B、Nauru is so small that the plane lands in what is best described as the capital's main street. The seaward side of the runway has traffic lights at each end to stop cars when planes are landing. The tiny air terminal is crowded with well-fed and brightly clothed Naurans with their smart cars. New arrivals are driven off in Japanese minibuses for the 10-minute drive half way round the island to the only hotel, the luxurious Menen. The well-paved road passes rows of neat, modern houses, set among the trees. (David Lascelles, The Financial Times)

Legend has it that sometime toward the end of the Civil War(1861—1865)a government train carrying oxen traveling through the northern plains of eastern Wyoming was caught in a snowstorm and had to be abandoned. The driver returned the next spring to see what had become of his cargo. Instead of the skeletons he had expected to find, he saw his oxen, living, fat, and healthy. How had they survived？

The answer lay in a resource that unknowing Americans had trampled underfoot in their haste to cross the "Great American Desert" to reach lands that sometimes proved barren. In the eastern parts of the United States, the preferred grass for forage was a cultivated plant. It grew well with enough rain, then when cut and stored it would cure and become nourishing hay for winter feed. But in the dry grazing lands of the West, that familiar blue joint grass was often killed by drought. To raise cattle out there seemed risky or even hopeless.

Who could imagine a fairy-tale grass that required no rain and somehow made it possible for cattle to feed themselves all winter？ But the surprising western wild grasses did just that. They had wonderfully convenient features that made them superior to the cultivated eastern grasses. Variously known as buffalo grass, grama grass, or mesquite, not only were they immune to drought; but they were actually preserved by the lack of summer and autumn rains. They were not juicy like the cultivated eastern grasses, but had short, hard stems. And they did not be cured in a barn, but dried right where they grew on the ground. When they dried in this way, they remained naturally sweet and nourishing through the winter. Cattle left outdoors to fend for them selves thrived on this hay. And the cattle themselves helped plant the fresh grass year after year, for they trampled the natural seeds firmly into the soil to be watered by the melting snows of winter and the occasional rains of spring. The dry summer air cured them, much as storing in a ham cured the cultivated grasses.

What does the passage mainly discuss？

A．Western migration after the Civil War

B．The climate of the western United States

C．The raising of cattle

D．A type of wild vegetation

A.外露导电部分接地极和电源接地极的接地电阻

B.外露导电部分接地极和PE线的阻抗

C.电源接地极的接地电阻

D.外露导电部分接地极电阻

为()。

A. 非带电体

B. 带电体

C. 部分带电体

areas. A new United Nations study forecasts that by the year 2000,2 billion persons will be added to the 4.4 billion in the world today.

Even more troubling than the increasing number of inhabitants are the projections of where they will be concentrated. The study by Rafael M. Solos, executive director of the U. N. Fund for Population Activities, notes that by the year 2000:

Nearly 80 percent of all people will live in less developed countries, many hard pressed to support their present populations. That compares with 70 percent today.

In many of these Third World lands metropolises (大城市) will become centers of concentrated urban poverty because of a flood of migration from rural areas.

The bulging(膨胀的) centers mainly in Asia and Latin America, will increasingly become fertile fields for social unrest. More young residents of the urban clusters(一群) will be better educated, unemployed and demanding of a better lifestyle.

To slow the rush to urban centers, countries will have to vastly expand opportunities in the country side, the study suggests. Solos says: "The solution to the urban problem lies as much in the rural areas as in the cities themselves."

Worldwide, the numer of large cities ,will multiply. Now 26 cities have 5 million or more residents each and a combined population of 252 million. By the end of the decade, the number will escalate to 60. with an estimated total of almost 650 million people.

In the last paragraph, the word "escalate" means ______.

A．decrease

B．increase

C．go down

D．decline

A.接地极入地深度大于2500mm

B.措接长度超过10cm

C.组件与组件黄绿线连接

D.三面满焊井做防锈处理

考虑建立一个锁箱系统，以加速西海岸销售的现金回收。一家洛杉矶银行同意提供锁箱系统，每个月的费用为1500美元，每笔交易的费用为0．15美元。如果平均的计算机销售额为2 500美元，请问每个月计算机的销售额达到多少时，才值得建立该锁箱系统？