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问题 单项选择题

Kalakota和Whinston的柱状框架，将公共政策和技术标准看做是支撑（）基础设施的两根栋梁。①网络，②多媒体内容，③信息传递，④公共业务服务

A.①②③

B.②③④

C.①②④

D.①②③④

答案

参考答案：D

单项选择题

Growth of real GDP in the Czech Republic is at a historically low level. An economic summit in Prague invited the leading economists to pose a solution to the declining economic situation. Many of the economists in attendance subscribe to supply side economic theory. Their solution is to reduce the incredibly high marginal tax rate of 68% to 35%. The primary benefit of such a policy is:（）

A. higher levels of disposable income and ability to consume goods and services leading to higher GDP.

B. greater incentive for individuals to spend-their income on tax-deductible luxury items.

C. increased incentive for domestic investment leading to increased aggregate supply and GDP.
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多项选择题

电动机安装应符合（）要求

A.电动机安装前，应核对机座、地脚螺栓（孔）的轴线、标高、地脚螺栓（孔）位置，机座的沟道。孔洞，电缆管的位置、尺寸及其质量，确认符合要求后，方可进行下道工序

B.按弹出的机座底盘中心线，以底盘中心线控制电动机就位的位置，及时准确地校正电动机和所驱动机器的传动装置，必须使它们共同位于同一中心线

C.在基础上放置楔形垫铁和平垫铁，垫铁应沿地脚螺栓的边沿和集中负载的地方放置。并尽可能放在电动机底板支承肋下面

D.校正电机的标高及水平度，用楔形垫铁调整电动机达到所需的位置，标高及水平度。电动机安装的水平度可用水平仪找正

E.对电动机及地脚螺栓进行校正验收后，进行二次灌浆，灌浆的配合比和强度等级以经验为准
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