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问题 单项选择题

由于填塞塑料造成支架移位的原因是

A．装盒石膏包埋过多

B．塑料充填过软

C．塑料充填带入气泡

D．支架焊接移位

E．塑料充填过硬过多

答案

参考答案：E

解析：填塞塑料易出现以下问题：牙冠不完整、支架移位、石膏损坏、塑料填够不足。

单项选择题

Selection to participate in a top executive-education program is an important rung on the ladder to top corporate jobs. U. S. corporations (1) billions of dollars in this form of management development -- and use it to (2) and train fast-track managers. Yet one (3) of executive education found that less than 5% of the managers (4) to these high-profile programs are women -- and minorities are terribly (5) as well.

The numbers are (6) . In regular business (7) usually paid for by the participant, not an employer -- there are plenty of women and minorities. Women, for example, (8) for about 30% of MBA candidates. Yet in the (9) programs paid for by corporations that round out a manager’s credentials at a (10) career point, usually at age 40 or 45, companies are making only a (11) investment in developing female and minority executives. A case (12) point: Only about 30% of the 180 executives in Stanford’s recent (13) management program were women.

Most companies say these days they are (14) hiring and promoting women and minorities-- and there are some (15) trends in overall employment and pay levels so why are companies (16) the ball when it (17) executive education The schools (18) that they are neither the cause of nor the cure for the problem. A Harvard Business School dean figures that companies are (19) of sending their female executives (20) they don’t want to lose them to competitors.

4（）

A.delivered

B.transported

C.transmitted

D.sent
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单项选择题 A1/A2型题

辅酶的性质是（）

A.酶和底物复合物

B.小分子肽

C.核酸分子

D.酶催化活性所必需的小分子物质

E.大分子物质
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