问题 单项选择题 A1/A2型题

以下不是骨性关节炎的CT下表现的是()

A.关节间隙狭窄,两侧不对称

B.关节面骨质硬化、变形

C.唇样骨刺形成

D.关节面下可有囊性变

E.骨质呈均匀膨胀

答案

参考答案:E

解析:骨性关节炎的CT主要表面为关节间隙狭窄,两侧常不对称;关节面骨质硬化和变形,关节间及关节不平整,关节面变扁或呈方形;唇样骨刺和骨桥形成,骨刺密度增高,有时类似象牙质样;关节面下可有囊性变,呈小圆形及椭圆形小低密度区,其外周骨质硬化,关节内可有游离体,为圆形或椭圆形碎骨片。故答案应选E。

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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.