（46）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, thi
| Normally a student must attend a
certain number of courses in order to graduate, and each course which he attends
gives a credit which may matter toward a degree. In many American universities
the total work for a degree consists of thirty-six courses each lasting for one
semester. A typical course consists of three classes per week for fifteen weeks;
while attending a university a student will probably attend four or five courses
during each semester. Normally a student would expect to take four years
attending two semesters each year. It is possible to spread the period of work
for the degree over a longer period. It is also possible for a student to move
between one university and another during his degree course, though this is not
in fact done as a regular practice. For every course followed a student is given a grade, which is recorded, A. dealing with the academic affairs of the university B. ensuring that the students observe university regulations C. evaluating students’ performance by bringing them before a court D. keeping up the students’ enthusiasm for social activities [多项选择]关于人体组织的声学特性，叙述正确的有（）.
A. 软组织、肌肉、骨的声阻抗不同 B. 在肝组织中，用3.5MHz与5.0MHz探头检查时的声速相同 C. 在同一软组织中超声波的频率与波长成反比 D. 正常肝组织与占位病灶组织密度不相同，但声速相同 E. 10MHz超声波在虹膜中的声速等于其在巩膜中的声速 [单项选择]李教授一次取得稿酬12万元，其应缴纳个人所得税（）万元。
A. 1.923 B. 1.344 C. 1.536 D. 1.478 [单项选择]用于蛋白质中氨基酸组分的分析方法是（）
A. 凝胶层析 B. 离子交换层析 C. 亲和层析 D. 圆二色性技术 E. 免疫浊度法 [单选题]3.703. 第703题互感器二次回路的连接导线应采用( )。
A.钢芯铝绞线 B.铜质多芯绝缘线 C.铜质单芯绝缘线 D.铜芯绝缘线 [单选题]1.158.第158题各级表库应在营销系统中用()模块生成盘点任务,完成盘点流程,盘点结果分盘盈、盘平、盘亏
A.库房配送 B.库房盘点 C.资产档案 D.资产查询 [判断题]对于警卫的要求和警告，可以不去理会。( )
A.正确 B.错误 [单项选择]The advantage of overhead bridges is that ______.
[单选题]在TETRA标准中，除了（ ）具有强拆功能之外，预占优先同样具备强拆功能。
A.全呼 B.组呼 C.选呼 D.紧急呼叫 [单选题]党的十六大报告中提出,( )必须相信和依靠人民,人民是推动历史前进的动力。.
A.改革 B.发展 C.开放 D.创新 [单选题]定期检查周期视桥梁技术状况而定，最长不得超多(___)年。
A.A.4 B.B.3 C.C.2 D.D.1 [多选题]如何正确评价地税局要求这批公务员在该局内部合同工中录用的行为？
A.地税局的行为是出于便利工作的想法.并无不妥 B.地税局的行为将能有效提升该局的工作效率 C.违反公务员法关于招录公务员公开考试的规定 D.录用范围不应限于该局内部合同工 [多选题]公变客户电费核查的主要项目有（ ）。
A.电量异动 B.电价标准 C.违约电费 D.总分表关系 [单选题]电源线、保护接零线、保护接地线不可采用（ ）方法连接。
A.绑接 B.焊接 C.压接 D.螺栓连接 我来回答: 提交
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