（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