如果被除数乘12,要使商不变,除数应当______.

题型:填空题

问题:

如果被除数乘12,要使商不变,除数应当______.

考点:和差积商的变化规律
题型:填空题

一金属球,原来不带电,现沿球的直径的延长线放置一均匀带电的细杆MN,如图所示,金属球上感应电荷产生的电场在球内直径上a、b、c三点的场强大小分别为Ea、Eb、Ec,三者相比(  )

A.Ea最大

B.Eb最大

C.Ec最大

D.Ea=Eb=Ec

题型:填空题
设a,b,c∈(0,+∞)且a+b+c=1,令x=(
1
a
-1)(
1
b
-1)(
1
c
-1)
,则x的取值范围为(  )
A.[0,
1
8
B.[
1
8
,1)
C.[1,8)D.[8,+∞)
题型:填空题

男性患者,58岁,慢性肝炎病史20年患者,双上肢皮肤可见小动脉末端分支性扩张形成的血管痣,大小约2cm,应诊断为

A.紫癜
B.瘀点
C.玫瑰疹
D.蜘蛛痣
E.充血性皮疹

题型:填空题

前磨牙楔状缺损应选用的最佳充填材料是()

A.银汞合金

B.聚羧酸锌黏固粉

C.树脂改性的玻璃离子黏固粉

D.化学固化复合树脂

E.磷酸锌黏固粉

题型:填空题

(46) John Dunlop, dean of the Faculty of Arts and Sciences from July 1970 to February 1973, thought that the most significant element in Harvard’s transition from the 1960s to the 1970s was not the student takeover of University Hall, but the institutional changes unleashed by that event. Dunlop was ideally suited to take charge in the confusing post-bust period. Forceful, self-confident, canny, he became the czar of the interregnum. He sought to restore civil discourse by engaging the faculty in institutional reform. He chaired the University Committee on Governance that Pusey and the Corporation set up in September 1969. (47) From it came a flow of subcommittee reports: on Harvard and money, faculty and student rights and responsibilities, the presidential selection process, the nature and purposes of the University, and the organization and functions of the Governing Boards and the president’s office.
The committee found a Corporation and a president overwhelmed by day-to-day problems. (48) It proposed that there be vice presidents of finance, administration, development, and government and community affairs, and that a senior academic officer—a chancellor or provost—foster interfaculty programs and speak for the president on matters of educational policy. (49) The authors knew that "the damage of the reputation of the administrative function is so pervasive in the University that the sudden assertion of its importance.., may send shock waves through the community and cause particular concern among Deans. " But they believed that it was essential "to staff and perform properly the neglected service functions" of the University.
Derek Bok decided that to plunge at once into centralized administration was "too much. " He agreed on the need for a passel of new vice presidents, but was well aware of the powerful Harvard tradition of autonomous schools and faculties led by baronial deans (He had been one himself). While he had favored the appointment of a provost before he took office, now he had second thoughts. The major responsibility of most university provosts was budgetary: deciding how the financial pie should be sliced. That would reduce the authority of the deans. Even less attractive was the notion of having a provost to deal with educational and academic matters; Bok intended to do that himself.
At the same time he was a p believer in professional expertise. (50) This meant breaking away from Harvard’s tradition of administrators whose qualifications consisted in good part of having gone to the College and having close Harvard ties. Bok sought a different type of bureaucrat, of the sort prevalent at other large universities: professionals with outside experience.

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