下列不能增强关节牢固性的结构是（）-我要搜题网

[单项选择]反映右心室后负荷压力的是（）
A. BP
B. CVP
C. PVRI
D. CO
E. PCWP

[简答题]什么叫改善维修？

[单项选择]列车在其他车站发现技术状态不良的车辆，因特殊情况不能摘车时，如能确保行车安全，经（）同意，可回送到指定地点处理。（非正常办法第一章第五条第6款）
A. 列车调度员
B. 列检值班员
C. 车站值班员
D. 车辆调度员

[判断题]液压挺杆因为能自动补偿气门间隙，所以不再需要人工调整气门间隙。( )
A.正确
B.错误

[不定项选择题]共用题干第一篇

A Sunshade（遮阳伞）for the Planet

Even with the best will in the world,reducing our carbon emissions is not going to prevent global warming. It has become clear that even if we take the most strong measures to control emissions, the uncertainties in our climate models still leave open the possibility of extreme warming and rises in sea level. At the same time,resistance by governments and special interest groups makes it quite possible that the actions suggested by climate scientists might not be implemented soon enough.
Fortunately,if the worst comes to the worst,scientists still have a few tricks up their sleeves. For the most part they have strongly resisted discussing these options for fear of inviting a sense of complacency that might thwart efforts to tackle the root of the problem. Until now,that is a growing number of researchers are taking a fresh look at large-scale"geoengineering"projects that might be used to counteract global warming."I use the analogy of methadone,"says Stephen Schneider,a climate researcher at Stanford University in California who was among the first to draw attention to global warming."If you have a heroin addict,the correct treatment is hospitalization,and a long rehab. But if they absolutely refuse,methadone is better than heroin."
Basically the idea is to apply"sunscreen"to the whole planet. One astronomer has come up with a radical plan to cool Earth:launch trillions of feather-light discs into space,where they would form a vast cloud that would block the sun's rays.It's controversial,but recent studies suggest there are ways to deflect just enough of the sunlight reaching the Earth's surface to counteract the warming produced by the greenhouse effect. Global climate models show that blocking just 1.8 percent of the incident energy in the sun's rays would cancel out the warming effects produced by a doubling of greenhouse gases in the atmosphere.That could be crucial,because even the most severe emissions control measures being proposed would leave us with a doubling of carbon dioxide by the end of this century,and that would last for at least a century more. According to the first two paragraphs,the author thinks that______.
A.strong measures have been taken by the government to prevent global warming
B.It is impossible to prevent global warming by reducing carbon emissions
C.despite the difficulty,scientists have some options to prevent global warming
D.actions suggested by scientists will never be realized

[单项选择]下列不能增强关节牢固性的结构是（）A. 关节囊B. 关节韧带C. 关节面D. 关节液

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[单项选择]下列不能增强关节牢固性的结构是（）
A. 关节囊
B. 关节韧带
C. 关节面
D. 关节液