下面关于项目后评价的实施过程描述不正确的是( )。A．项目后评价单位接受委托后，首

The American economic system is organized around a basically private-enterprise, market-oriented economy in which consumers largely determine what shall be produced by spending their money in the marketplace for those goods and services that they want most. Private businessmen, striving to make profits, produce these goods and services in competition with other businessmen; and the profit motive, operating under competitive pressures, largely determines how these goods and services are produced. (47)Thus, in the American economic system it is the demand of individual consumers, coupled with the desire of businessmen to maximize profits and the desire of individuals to maximize their incomes that together determine what shall be produced and how resources are used to produce it.
(48)An important factor in a market-oriented economy is the mechanism by which consumer demands can be expressed and responded to by producers. In the American economy, this mechanism is provided by a price system, a process in which prices rise and fall in response to relative demands of consumers and supplies offered by seller-producers. If the product is in short supply relative to the demand, the price will be bid up and some consumers will be eliminated from the market. (49)If, on the other hand, producing more of a commodity results in reducing its cost, this will tend to increase the supply offered by seller-producers, which in turn will lower the price and permit more consumers to buy the product. Thus, price is the regulating mechanism in the American economic system.
The important factor in a private-enterprise economy is that individuals are allowed to own productive resources (private property), and they are permitted to hire labor, gain control over natural resources, and produce goods and services for sale at a profit. (50)In the American economy, the concept of private property embraces not only the ownership of productive resources but also certain rights, including the right to determine the price of a product or to make a free contract with another private individual.

容易发生妊娠期高血压的情况是（）

A.经产妇

B.早产

C.营养状况良好

D.孕妇年龄小于18岁或大于40岁

E.异位妊娠

（10分）漂白粉在生活、工业生产中用途广泛，漂白粉除了具有漂白作用外，还能杀菌消毒。2003年抗“非典”期间，各商场漂白粉及其他漂白产品曾一度脱销。

（1）用Cl₂和石灰乳制作漂白粉的反应方程式                                 

          其成分是            有效成分是      （填名称）

（2）用Cl₂和石灰乳制作漂白粉的目的是   （   ）

A．转变为较HClO稳定且易储运的物质　　　

B．转变为更易溶于水的物质

C．提高氯气原利用率　

D．增强漂白能力（3）瓶装漂白粉久置空气中会失效。用化学方程式表示漂白粉在空气中易失效的原因：

①                                            

②                                           

现有某公司历年销售库存量资料，如表4-6所示。

表4-6

根据上述资料请回答：

用三项移动和五项移动平均法进行移动平衡，得到2009年1月份利润额的预测值分别为（）万元。

A．45.6；45.3

B．45.3；45.3

C．45.7；46.1

D．46.3；45.6

什么叫汽油机的速度特性？