这个路口允许车辆怎样行驶？（） A．向左、向右转弯 B．直行或向左转弯 C．向左转弯

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 con sumers 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.

细菌的生化检测试验及方法包括（）。

A.VP试验

B.硫化氢试验

C.气液相色谱法

D.多聚酶链反应

E.细菌药敏试验

以下不属于性偏好障碍的是()

A．异装症和恋物症

B．露阴症、窥阴症和摩擦症

C．同性恋

D．性施虐

E．性受虐症

责任扩散效应指当发生了某种紧急事件时，如果有其他人在场，那么在场者所分担的责任就会减小。因为每个人都认为助人的责任和助人的失败所带来的可能成本应由大家共同承担，也就是说提供帮助的责任扩散到其他人身上。
根据上述定义，下列哪项体现了责任扩散效应( )

A．一个和尚挑水喝，两个和尚抬水喝，三个和尚没水喝
B．小柳家发生火灾，大家纷纷来救火，火很快就被扑灭了
C．某区执法部门强行拆迁，被拆迁者义愤填膺，一起砸毁了执法车辆，事后大家并没有感到害怕，因为他们觉得法不责众
D．某女孩被汽车撞倒在地，小红本想上前帮忙，但看周围还有很多人，觉得肯定会有人管的，就去忙自己的事了