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A．药物的吸收过程B．药物的排泄过程C．药物的转运方式D．药物的光学异构体E．药物的表观分布容积 药物作用持续时间长短取决于（）
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Directions:Read the following text. Choose the best word(s) for each numbered blank and mark A, B, C or D on ANSWER SHEET 1. Advances in computers and data networks inspire visions of a future "information economy" in which everyone will have (1) to gigabytes of all kinds of information anywhere and anytime, (2) information has always been a (3) difficult commodity to deal with, and, in some ways, computers and high-speed networks make the problems of buying, (4) , and distributing information goods worse (5) better. The evolution of the Internet itself (6) serious problems. (7) the Intemet has been privatized, several companies are (8) to provide the backbones that will carry traffic (9) local networks, but (10) business models for intereonnectinn—who pays how much for each packet (11) , for example—have (12) to be developed. (13) intereonnection standards are developed that make (14) cheap and easy to transmit information across independent networks, competition will (15) . If technical or economic (16) make interconnection difficult, (17) transmitting data across multiple networks is expensive or too slow, the (18) suppliers can offer a signfficant performance (19) ; they may be able to use this edge to drive out competitors and (20) the market.
日本人及瑞典人红细胞中缺乏或基本没有过氧化氢酶，因此对过氧化氢解毒能力低
某矿山，其矿渣长期堆放在小河边，历经若干时期后，附近农民陆续出现头晕、头痛、记忆力减退、四肢无力、周围神经炎及脱发等症。后经上级疾控中心调查，在土壤、河水、蔬菜中均发现有病因物质，并验证此病因物质来源于矿渣 此矿渣最可能来源于
On July 12, 1993, a young professor of American history named Frederick Jackson Turner stood up to speak. The scene was the American History Congress at the Chicago World’s Fair. (62) His paper was titled "The significance of the Frontier in American History." Turner had a new idea. (63) And many historians who heard him recognized that he had come upon a simple theory that seemed right.To Turner, the frontier was one of the most powerful forces shaping the American character. He pointed out that the frontier was a place for new beginnings, a place where men and women could build new lives. Thus, the frontier represented hope and opportunity to Americans. Turner also pointed out that these new lives on the frontier were shaped by tile hardships of surviving in the wilderness. Thus, life on the frontier produced determination in Americans and made them believe in the value of work. (64)According to Turner’s theory, the frontier was a place where everyone had to struggle equally hard. (65) Thus, frontier life helped shape the American ideal of equality, independence, and democracy. And many historians who heard him recognized that he had come upon a simple theory that seemed right.
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