下列哪项不是永久性起搏器置入适应证()。 A.伴有临床症状的任何水平的完全或高度房室

题型:单项选择题

问题:

下列哪项不是永久性起搏器置入适应证()。

A.伴有临床症状的任何水平的完全或高度房室传导阻滞

B.临床症状明确,心室率常低于50次∕分的病态窦房结综合征或房室传导阻滞

C.无临床症状,间歇性心室率低于40次∕分,或长达3秒的R-R间歇的病态窦房结综合征或房室传导阻滞

D.急性心肌梗死合并完全性房室传导阻滞,心室率低于40次∕分,或长达3秒的R-R间歇

E.临床症状明确,颈动脉窦过敏引起心率减慢,心室率低于40次∕分,或长达3秒的R-R间歇

考点:重症医学(医学高级)重症医学综合练习重症医学综合练习题库
题型:单项选择题

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.

The word "hand-wringing" (Para. 4) probably means "______"

A. anger
B. worries
C. interests
D. delight

题型:单项选择题

设一台PC机的显示器分辨率为800×600,可显示256种颜色,显示卡上的显示存储器的容量是()。

A.0.5MB

B.1MB

C.1.5MB

D.2MB

题型:单项选择题

关于感光效应与摄影距离的关系,正确的叙述是()

A.感光效应与摄影距离成反比

B.感光效应与摄影距离成正比

C.感光效应与摄影距离的平方成反比

D.感光效应与摄影距离的平方成正比

E.感光效应与摄影距离的立方成反比

题型:单项选择题

加热炉管氢损伤主要有氢鼓泡、氢脆、表面脱碳和()等。

A.硫腐蚀

B.氢腐蚀

C.连多硫酸腐蚀

D.环烷酸腐蚀

题型:单项选择题

简述课程的四种有代表性的定义

更多题库