关于DSA成像的基本原理,哪项描述不正确() A.数字荧光成像(digitalflu

题型:单项选择题 A1/A2型题

问题:

关于DSA成像的基本原理,哪项描述不正确()

A.数字荧光成像(digitalfluorography,DF.是DSA的基础

B.需将影像增强电视系统(imageintensifytelevision)图像像素化

C.经A/D转换器,将像素转换为数字,即数字化

D.经计算机减影处理

E.图像进行模拟减影

考点:放射医学技术(士)DSA成像理论DSA成像理论题库
题型:单项选择题 A1/A2型题

按"药品注册管理办法"研制新药,并要严格试制品的保管与使用手续,防止流失的是()

A.1万级洁净区 

B.30万级洁净区 

C.一万级背景下局部100级 

D.10万级洁净区 

E.百级洁净区

题型:单项选择题 A1/A2型题

蛋白质合成的终止是由于()

A.特异的tRNA识别了终止密码

B.已经到达mRNA分子的尽头

C.释放因子能识别终止密码并进入受位

D.mRNA上出现的终止密码阻止了核糖体的移动

E.终止密码子部位有较大阻力,核糖体无法沿mRNA移动

题型:单项选择题 A1/A2型题

Some consumer researchers distinguish (1) "rational" motives and "emotional" (or "non-rational") motives. They use the term "rationality" (2) the traditional economic sense that assumes (3) consumers behave rationally when they carefully consider all alternatives (4) choose those that give them the greatest utility (i.e., satisfaction). (5) a marketing context, the term "rationality" implies that the consumer selects goods based (6) totally objective criteria, such (7) size, weight, price, and so on. "Emotional" motives imply the selection of goods (8) to personal or subjective criteria—the desire (9) individuality, pride, fear, affection or status.
The assumption underlying this distinction is (10) subjective or emotional criteria do not maximize utility or satisfaction. (11) , it is reasonable to assume that consumers always attempt to select alternatives that, (12) their view, serve to maximize satisfaction. Obviously, the assessment of satisfaction is a very personal process, based (13) the individual’s own needs as (14) as on past behavioral, social, and learning experiences. What may appear (15) irrational to an outside observer may be perfectly rational (16) the context of the consumer’s own psychological field. For example, a product purchased to enhance one’s self-image (such as a fragrance) is a perfectly rational form of consumer behavior. (17) behavior did not appear rational to the person who undertakes it (18) the time that it is undertaken, obviously he or she would not do it. (19) the distinction between rational and emotional motives does not appear to be warranted.
Some researchers go so far (20) to suggest that emphasis (21) "needs" obscures the rational, or conscious, nature of most consumer motivation. They claim that consumers act consciously (22) maximize their gains and minimize their losses; that they act not (23) subconscious drives but from rational preferences, (24) what they perceive to be (25) their own best interests.

题型:单项选择题 A1/A2型题

患儿,2岁,高热、咳嗽,伴疱疹性结膜炎和结节性红斑,有结核病密切接触史,疑为急性粟粒型结核,拟行结核菌素试验。

对该患儿进行结核菌纯蛋白衍化物(PPD)试验宜选用的结素单位为

A.1结素单位(0.5ml)
B.5结素单位(0.1ml)
C. 10结素单位(0.1ml)
D. 50结素单位(0.1ml)
E.100结素单位(0.1ml)

题型:单项选择题 A1/A2型题

控制文件柜5VDC电源调节器的LEDs用于指示卡件工作状态, ()表示电源调节卡运行正常

A、CARD FAULT(DS4)    

B、5 FUSE BLOWN(DS2)

C、CARD GOOD(DS1)

D、+5VDC STATUS(DS5)

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