搜题请搜索小程序“爱下问搜题”
问题 填空题

用化学符号填空：

（1）氮元素______（2）铁元素______（3）铜元素______

（4）钾元素______（5）磷元素______（6）钙元素______

（7）氧气______（8）二氧化碳______（9）水______．

答案

（1）氮元素为：N

（2）铁元素为：Fe

（3）铜元素为：Cu

（4）钾元素为：K

（5）磷元素为：P

（6）钙元素为：Ca

（7）氧气为：O2

（8）二氧化碳为：CO2

（9）水为：H2O

故答案为：（1）N（2）Fe（3）Cu（4）K（5）P（6）Ca（7）O2（8）CO2（9）H2O

填空题

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 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.
查看答案
选择题

下列有净化污水作用的生物是（　　）

A．酵母菌

B．草履虫

C．变形虫

D．衣藻
查看答案