如图所示，充电的平行板电容器两板间形成匀强电场，以A点为坐标原点，AB方向为位移x的正方向，能正确反映电势φ随位移x变化的图象是（ ）
A．
B．
C．
D．
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用C（A）表示非空集合A中的元素个数，定义A*B=
|
下列词语中没有错别字的一组是( )。
A．摄取 和蔼可亲 入不付出
B．箴言 语无伦次 流恋忘返
C．荧屏 阴谋诡计 短小精悍
D．福祉 万事享通 名列前矛
下列关系正确的是
A．常温下，pH=3强酸HA溶液与pH=11NaOH溶液混合，c(Na+)= c(A－)＞c(H+)= c(OH－)
B．c(NH4+)相等的①(NH4)2SO4溶液②NH4HSO4溶液③NH4Cl溶液，pH大小关系是③＞①＞②
C．标况下，2.24L H2S通入3mol/L100mL NaOH溶液，c(Na+) =2c(H2S)+ 2c(HS－)+2c(S2－)
D．0.1mol/L盐酸溶液与0.05mol/LNaAlO2溶液等体积混合，c(Cl－)＞c(Na+)＞c(Al3+)＞c(H+)＞c(OH－)
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.
某香皂厂的一个设计人员为了创新，他将香皂设计成了蛋糕形，顾客购买后，在家里经常有老人、儿童误把香皂当蛋糕食用，这种设计主要违背了设计的原则是（）。
A、创新性原则
B、实用性原则
C、安全性原则
D、美观性原则