使用()装夹箱体类工件,装夹后,必须要经过平衡。 A.花盘 B.三爪卡盘 C.四爪卡

题型:单项选择题

问题:

使用()装夹箱体类工件,装夹后,必须要经过平衡。

A.花盘

B.三爪卡盘

C.四爪卡盘

D.中心架

考点:特种设备相关管理电梯安全管理电梯安全管理题库
题型:单项选择题

从生物圈的物质构造来说,它存在着几大类成分,下列选择中有误的一项是( )。

A.已经获得有机结构,但始终不曾具有生命的物质

B.有机的生命物质

C.曾经一度有生命而现在仍然保留着某些有机性质和能力的无生命物质

D.各种无机物质

题型:单项选择题

2009年4月,我国政府响应联合国的倡议,制定了《国家 * * 行动计划(2009—2010年)》,明确了我国政府在促进和保护 * * 方面的工作目标和具体措施。这说明①我国的民主具有阶级性②我国切实承担应有责任,推动建设和谐世界③我国的民主具有真实性④我国政府与其他国家对待 * * 问题的态度是一致的

A.①④

B.②③

C.①③

D.②④

题型:单项选择题


In the following passage, there are 25 blanks representing words that are missing from the context. You are to put back in each of the blanks the missing word. Write your answers on the ANSWER SHEET. The time for this section is 25 minutes.
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.

题型:单项选择题

工业革命中,在动力机器的发明和利用上,具有开创作用的人物是[ ]

A.莱特兄弟

B.瓦特

C.富尔顿

D.史蒂芬孙

题型:单项选择题

用卡规测量轴径时,过端通过而止端不通过,则这根轴的轴颈尺寸()。

A.合格

B.不合格

C.可能合格也可能不合格

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