三颗人造地球卫星A、B、C绕地球作匀速圆周运动,如图所示,已知mA=mB>mC,

题型:选择题

问题:

三颗人造地球卫星ABC绕地球作匀速圆周运动,如图所示,已知mA=mB>mC,则对于三个卫星,正确的是······(     )

A.运行线速度关系为vA<vB<vC

B.运行周期关系为TA=TB<TC

C.向心力大小关系为FA>FB>FC

D.运行半径与周期关系为

考点:人造地球卫星
题型:选择题

在叶芽的结构中,将来能够发育成茎的是_________,发育成侧芽的是_________。

题型:选择题


所给出的图、表、文字或综合性资料均有若干个问题要你回答。你应该根据资料提供的信息进行分析、比较、计算或判断处理。
文字资料一

国家工商总局公布的数据显示,2009年第一季度,全国工商行政管理机关共查处各类违法违章案件68202件,同比下降29.98%;其中立案查处案件49654件,同比下降32.26%,案件总值33.57亿元,同比下降21.26%,罚没金额3.33亿元,同比下降39.49%。
从违法法规看,违法企业登记管理法规案件9216件,同比下降38.54%;违反产品质量法规案件6760件,同比下降27.51%;违反反不正当竞争法规案件4944件,同比增长6.51%;违反商标法规案件4119件,同比下降21.93%;违反广告法规案件2141件,同比下降24.27%;违反消费者权益保护法规定案件1644件,下降13.66%;违反合同法规案件156件,同比下降57.02%。
从违法主体看,在立案查处的案件中,个体工商户案件22142件,同比下降22.73%;自然人案件12472件,同比下降49.04%;公司案件6521件,同比下降21.37%,私营企业案件3975件,同比下降22.27%;集体企业案件728件,同比下降45.26%。

若保持同比下降率不变,预计2010年第一季度全国立案查处案件数将( )

A.接近4.8万

B.接近3.4万

C.接近1.6万

D.接近2.1万

题型:选择题

加热炉烧焦所需的蒸汽压力为()。

A、0.2MPa

B、0.4MPa

C、0.6MPa

D、0.8MPa

题型:选择题

原型

题型:选择题

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.

更多题库