【分析解答题】(15 分)为了测定甲、乙两台灌装机器灌装的重量是否相同，并对两台机器灌装重量误差的差异做出估计，从甲机器抽取灌装好的25 个样品，乙机器抽取16 个样品，测试结果表明，甲机器灌装平均重量22kg，乙机器灌装平均重量20kg，根据过去的经验，两机器的方差均为10kg，试求： 检验甲乙两台机器灌装的平均重量有无显著差异(α＝0.05，
)。
)。【分析解答题】(5 分)试述在蜗轮副的间隙消除中，采用双螺距蜗杆方法的工作原理和特点。
【分析解答题】(6 分)某企业生产的某套产品需5 个
A、零件和1 个
B、零件装配成一套，
A、
B、零件的成本和价格见下表。
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求： 当销售量是6000 套时，经营安全率是多少？安全状况如何？
A、零件和1 个
B、零件装配成一套，
A、
B、零件的成本和价格见下表。
【分析解答题】简述林业技术引进项目管理的基本程序。
【分析解答题】简述作物生殖器官脱落的主要原因。(6 分)
【分析解答题】
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【单选题】
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【分析解答题】
【单选题】Inflation is a period of rapid rises in prices. When your money buys fewer goods so that you get (56) for the same amount of money as before, inflation is the problem. Sometimes people describe inflation as a time when "a dollar is not (57) a dollar anymore".
Inflation is a problem for all consumers, especially people who live on a fixed income. Retired people, for instance, cannot (58) on an increase in income as prices rise. They face serious problems in stretching their incomes to (59) their needs in time of inflation. Many retired people must cut their spending to (60) rising prices. In many cases they must stop (61) some necessary items, such as food and clothing.Even (62) working people whose incomes are going up, inflation can also be a problem. The (63) of living goes up, and they must have even more money to maintain their standard of living. When incomes do not keep (64) with rising prices, living standard goes down. People may be earning the same amount of money, but they are not living (65) because they are not able to buy as many goods and services.
Government units gather information about prices in our economy and publish it as price indexes (66) the rate of price change can be determineD、A、price index measures changes in prices using the price for a (67) year as the base. The base price is set (68) 100, and the other prices are reported as a (69) of the base price.A、price index makes (70) possible to compare current price with that in previous years.
A．meet
B．obtain
C．care
D．acquire
Inflation is a problem for all consumers, especially people who live on a fixed income. Retired people, for instance, cannot (58) on an increase in income as prices rise. They face serious problems in stretching their incomes to (59) their needs in time of inflation. Many retired people must cut their spending to (60) rising prices. In many cases they must stop (61) some necessary items, such as food and clothing.Even (62) working people whose incomes are going up, inflation can also be a problem. The (63) of living goes up, and they must have even more money to maintain their standard of living. When incomes do not keep (64) with rising prices, living standard goes down. People may be earning the same amount of money, but they are not living (65) because they are not able to buy as many goods and services.
Government units gather information about prices in our economy and publish it as price indexes (66) the rate of price change can be determineD、A、price index measures changes in prices using the price for a (67) year as the base. The base price is set (68) 100, and the other prices are reported as a (69) of the base price.A、price index makes (70) possible to compare current price with that in previous years.
A．meet
B．obtain
C．care
D．acquire
【分析解答题】The theory of socialDarwinism generally claims that individuals, groups and peoples or cultures are subject to the sameDarwinian laws of natural selection as are plants and animals.The theory holds that "superior" individuals or groups survived and succeeded while the inferior disappeared, with a consequent benefit to society, and that the existing order must be the natural one.Any individual, group or institution that survives the struggle to exist over a long period of time is regarded as having displayed evidence for its own "natural" superiority and legitimacy, similar to theDarwinian concept of "survival of the fittest". In history, this theory has been questioned because it could be easily used to justify political conservatism, imperialism, and racism.
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