题目内容

Marvin Minsky is famous (1) the father of Artificial Intelligence, but he was (2) the author of another signal achievement. In the 1950s, he built a revolutionary light microscope that enabled him to (3) successfully deeper layer in a specimen with astonishing clearness, (4) first having to undertake the hard task of cutting the specimen into thin (5) Minsky’s invention did not (6) wide praise from the public at that time. (7) , when he patented(申请 专利权) his "double - focusing stage-scanning microscope" in 1961, (8) people understood what it could do. During the 17-year life of the patent, no (9) of similar design were manufactured. (10) for his newly invented optics, Minsky (11) on to other challen- ges, leaving his intention to rust in a (12) of his basement. Thirteen years later his approach (13) known as confocal microscopy(双焦显微镜学) caught public attention. (14) , the technology is proving to be one of the most exciting advances in optical microscopy in this century. The extent (15) which current interest was sparked by rediscovery of Minsky’s early (16) is not completely clear. (17) , the happy result is that scores of (18) kinds of confocal microscopes are now (19) in form that (20) from easy to complicated.

A. for
B. at
C. as
D. in

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人民币汇率形成机制改革坚持主动性、可控性、渐进性的原则。2005年7月21日,人民币汇率形成机制改革启动,开始实行以市场供求为基础、参考一篮子货币进行调节、有管理的浮动汇率制度。自汇率形成机制改革以来,人民币汇率弹性逐步扩大,并形成双向波动的格局,呈现稳中有升的态势。 根据以上资料,回答下列问题: 银行间市场是外汇市场的核心,改革后银行间市场的交易机制包括( )。

A. 双向交易
B. 单向交易
C. 询价交易
D. 美元做市商制度

American teenagers have always worked for extra pocket money. More than their predecessors (前辈), today’s young people are (1) to work long hours during the week for hundreds of dollars each months. They spend the money (2) themselves rather than contributing it (3) their families. In a 1997 (4) of 16,000 high school seniors nationwide, it was (5) that eighty percent of students who worked (6) their earnings on their own needs, (7) as clothing, stereo equipment, records and movies. (8) five percent said they contributed most of their income, (9) often exceeded 200 a month, to help pay family living (10) . The benefits of this work-and- spend ethics (伦理观) are being (11) argued. Some experts, and many parents, (12) that year-round part-time employment increases youngsters’ (13) of worth, teaches them (14) responsibility and reduces tension, and thus conflict(冲突) (15) the family. Others, (16) , argue that working teenagers are separated, physically and financially, (17) their families, which in tum (18) parental authority. Teenagers’ schoolwork can also suffer."When youngsters (19) for luxuries, they are buying distraction (20) education," said a program director for the U.S. Department of Education. Working teenagers them- selves say they have less time to spend with their friends and families.

A. view
B. inspection
C. observation
D. survey

The horse and carriage is a thing of the past, but love and marriage are still with us and still closely interrelated. Most American marriages, (1) first marriages uniting young people, are the result of mutual attraction and affection (2) than practical considerations. In the United States, parents do not (3) marriages for their children. Teenagers begin dating in high school and usually find mates through their own academic and social (4) . (5) young people feel free to choose their friends from (6) groups, most choose a mate of similar (7) . This is due in part to parental guidance. Parents cannot (8) spouses (配 偶 ) for their children, but they can usually (9) choices by voicing disapproval of someone they consider unsuitable. (10) , marriages between members of different groups (interclass, interfaith, and interracial marriages) are (11) probably because of the greater mobility of today’s youth and the fact that they are (12) by fewer prejudices than their parents. Many young people leave their hometowns to attend college, serve in the armed forces, (13) pursue a career in a bigger city. Once away from home and family, they are more (14) to date and marry outside their own social group. In mobile American society, inter- class marriages are neither (15) nor astoni- shing. Interfaith marriages are (16) the rise, especially between Protestants (基督 教徒) and Catholics (天主教徒). On the other hand, interracial marriages are still very (17) . It can be difficult for interracial couples to find a place to live, maintain friendships, and (18) a family. Marriages between people of different national (19) (but the same race and religion) have been commonplace here (20) colonial times.

A. Therefore
B. However
C. Moreover
D. Likewise

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