简单效应
参考答案:
在某因素同一水平上,另一因素不同水平试验指标观测值之差称为简单效应。
(8分)2013年11月,许多居民收到一张“关于S公司部分奶产品价格调整的通知”。通知写道:今年以来,由于奶农(奶业公司)生产的原料奶收购价格同比增加50%,仍在持续上涨。并且其他原辅材料,比如包装材料、人工成本等也在持续上涨,企业无法通过采取精细化管理、高效生产运营等内部措施消化全部上升的成本。本公司决定,自2013年12月1日起,上调入户产品的价格纯牛奶每瓶0.5元、酸奶0.5元——。
运用有关知识,分析原料奶收购价格、包装材料、人工成本等持续上涨对奶农和乳品生产企业可能带来的影响。(8分)
The great advance (91) rocket theory 40 years ago showed that liquid-fuel rockets were far (92) in every respect to the skyrocket with its weak solid fuel, the only kind of rocket then known. (93) , during the last decade, large solid-fuel rockets with (94) fuels about as powerful as liquid fuels have (95) their appearance, and it is a favorite layperson’s question to (96) which one is "better". The question is meaningless. (97) might as well ask whether a gasoline or a diesel engine is "better". It all (98) on the purpose. A liquid-fuel rocket is complicated, (99) has the advantage that it can be controlled beautifully. The burning of the rocket engine can be stopped completely; it can be reignited when (100) . (101) , the thrust can be made to vary by adjusting the speed of the fuel pumps. A solid-fuel rocket, on the other hand, is rather (102) in construction, (103) hard to build when a really (104) size is desired. But once you have a solid-fuel rocket, it is ready for action (105) very short notice. A liquid-fuel rocket has to be fueled first and cannot be (106) readiness for very long after it has been fueled. (107) , once a solid-fuel rocket has been ignited, it will keep burning. It cannot be stopped and reignited (108) desired (it could conceivably be stopped and reignited after a pre-calculated time of burning has elapsed, and its thrust cannot be varied. Because a solid-fuel rocket can be kept ready for a long time, most military missiles (109) solid fuels, but human-piloted spaceflight needs the fine adjustments that can (110) be provided by liquid fuels.
A.basic
B.elementary
C.easy
D.simple