影响X线强度分布的因素是() A.靶面倾角 B.管电流大小 C.辐射时间的长短 D.

题型:单项选择题 A1/A2型题

问题:

影响X线强度分布的因素是()

A.靶面倾角

B.管电流大小

C.辐射时间的长短

D.阳极的类型(固定或旋转)

E.管内阳极与阴极间的距离

考点:放射医学技术(主管技师)主管技师(放射医学技术)相关专业知识考前冲刺二
题型:单项选择题 A1/A2型题

Fear seems to be the dominant mood of the moment. Hurricanes, tidal waves, floods, earthquakes and terrorism this year have all brought with them not only appalling scenes of devastation, death and suffering, but also outrage at the lack of preparations to avoid or cope with these disasters. Now even the birds of the air are a threat, we are told. That migrating flock visible On the horizon at sunset, once a consoling reminder of the eternal rhythms of nature, could be carrying the virus which might soon kill tens of millions of people.

Given the many fingers pointed at governments in the wake of other disasters this year, it is hardly surprising that they are scrambling to respond to the threat posed by avian influenza. After confirmation this week that the HSN1 strain of bird flu, which has been spreading quickly in Asia, had been discovered in Romania and perhaps Greece, European Union foreign ministers convened an emergency meeting. President George Bush, still smarting from a torrent of criticism of his government’s clumsy response to Hurricane Katrina, has promised to rush out emergency plans for dealing with an outbreak of pandemic flu which have been stalled for years. Countries around the world are hurrying to stockpile the only current antiviral drug, Tamifln, which might be effective in saving lives in any pandemic or curbing its spread. The World Health Organisation is calling for an internationally coordinated effort. Health ministers from around the globe are due to meet next week in Canada to discuss what steps to take.

Is any of this eff6rt justified Or are politicians simply helping to feed public panic, and then covering themselves by promising to spend lavishly against a threat which may never materialize and to reduce a risk which they do not understand To ask these questions is not to counsel complacency, but to apply the kind of test which is required in any kind of disaster planning, not least because the world is an inherently dangerous place and it is impossible to plan against every possible disaster. With the media full of warnings of impending mass death, an overreaction is all too possible.

It can be inferred from the first paragraph that ()

A. p resentment resulted from the lack of preparations to cope with recent disasters

B. the dominant mood of the moment resulted in the appalling scenes of devastation

C. tens of millions of people could carry the virus on the horizon

D. reminder of the eternal rhythms of nature emerged at sunset to avoid these disasters

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高龄患者,长期卧床,节段性肺炎反复发作,突然咳嗽、胸痛,胸片示右上肺纹理稀疏、透过度高,肺门形态欠自然。

进一步治疗()

A.外科手术取栓子

B.下腔静脉滤器植入术

C.长期抗凝治疗

D.下肢静脉结扎

E.下腔静脉支架植入

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根据企业破产法律制度的规定,下列各项中,属于破产费用的是( )。

A.破产案件的诉讼费用

B.管理、变价和分配债务人财产的费用

C.管理人执行职务的费用、报酬

D.因债务人不当得利所产生的债务

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