某企业几乎垄断了某种矿产品的国内所有矿山开采权，并以此在市场上形成了较强的竞争优势，

As Philadelphia grew from a small town into a city in the first half of the eighteenth century, it became an increasingly important marketing center for a vast agricultural hinterland. Market days (1) the crowded city even more crowded, as farmers from within a (2) of 24 or more kilometers brought their sheep, vegetables, cider and other products for direct sale to the (3) . The High Street Market was continuously (4) throughout the period until 1736, (5) it (6) from Front Street to Third. By 1745 New Market was opened on Second Street. The next year the Callow Hill Market began (7) .

Along with market days, the (8) of twice-yearly fairs persisted in Philadelphia (9) after similar trading days had been discontinued in other colonial cities. The (10) provided a means of bringing handmade goods from (11) places to would-be buyers in the city. Linens and stockings from Germantown, (12) , were popular items.

Auctions were another popular (13) of trade. Because of the competition, retail (14) opposed these as well as the fairs. (15) governmental attempts to eradicate fairs and auctions were less than successful, the ordinary (16) of economic development was on the merchants’side, as increasing business specialization became the (17) of the day. Export merchants became differentiated from their importing counterparts, and specialty shops began to appear (18) general stores selling a variety of goods.

One of the reasons Philadelphia’s merchants prospered was because the surrounding area was undergoing tremendous economic and demographic growth. They did their business, (19) , in the capital city of the province, (20) to not only the governor and his circle, but citizens from all over the colony.

17（）

A.command

B.order

C.recommendation

D.sequence

示教作业通常按（）的程序组织实施。

A、作业计划

B、作业准备

C、作业实施

D、作业讲评

E、作业研讨

渗出液总蛋白/血清总蛋白比值应大于( )

A．0.5

B．0.4

C．0.3

D．0.2

E．0.1

Her mother looked ______at that moment when she heard the good news.[      ]

A. happy    

B. happily  

C. unhappy    

D. sadly

下列哪种疾病没有高血压表现：（）

A.急性肾盂肾炎

B.急性肾小球肾炎

C.妊娠期肾病

D.肾动脉狭窄

E.嗜铬细胞瘤