液压系统中,()的作用是将液压泵提供的液压能转换为机械能,并驱动负载做功。A、控制元

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问题:

液压系统中,()的作用是将液压泵提供的液压能转换为机械能,并驱动负载做功。

A、控制元件

B、执行元件

C、辅助元件

D、动力元件

考点:采煤工采煤工题库
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在地籍信息系统中调出的( )不属于宗地的材料。

A.权属来源证明材料

B.土地证

C.地籍调查表

D.归户卡

题型:单项选择题

最简便且有价值的辅助检查是

A.心电图

B.超声心动图

C.胸片

D.肺通气扫描

E.肺灌注扫描

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There is no question that the academic enterprise has become increasingly global, particularly in the sciences. Nearly three million students now study outside their home countriesa 57% increase in the last decade. Foreign students now dominate many U.S. doctoral programs, accounting for 64% of Ph. D. s in computer science, for example.
Faculty members are on the move, too. Half of the world’s top physicists no longer work in their native countries. And major institutions such as New York University are creating branch campuses in the Middle East and Asia. There are now 162 satellite campuses worldwide, an increase of 43% in just the past three years.
At the same time, growing numbers of traditional source countries for students from South Korea to Saudi Arabia (沙特阿拉伯), are trying to improve both the quantity and quality of their own degrees, engaging in a fierceand expensiverace to recruit students and create world-class research universities of their own.
Such competition has led to considerable hand-wringing in the West. During a 2008 campaign stop, for instance, then—candidate Barack Obama expressed alarm about the threat that such academic competition poses to U. S. competitiveness. Such concerns are not limited to the United States. In some countries, worries about educational competition and brain drains have led to academic protectionism. India, for instance, places legal and bureaucratic barriers in front of Western universities that want to set up satellite campuses to enroll local students.
Perhaps some of the anxiety over the new global academic enterprise is understandable, particularly in a period of massive economic uncertainty. But educational protectionism is as big a mistake as trade protectionism is. The globalization of higher education should be embraced, not fearedincluding in the United States. There is every reason to believe that the worldwide competition for human talent, the race to produce innovative research, the push to extend university campuses to multiple countries, and the rush to train talented graduates who can strengthen increasingly knowledge-based economies will be good for the United States, as well.

A satellite campus is probably a branch campus that a university sets up ______.

A. in developed countries
B. in another country
C. inside another university
D. on the Internet

题型:单项选择题

简述服务的含义和特点。

题型:单项选择题

一患儿突发右小腿痛,活动障碍,X线示右胫骨中段骨折,骨折端膨大,骨皮质变薄。引起骨折的主要因素是()

A.直接暴力

B.间接暴力

C.积累性劳损

D.肌肉牵拉力

E.骨骼疾病

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