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问题 多项选择题

建立与市场经济发展要求相适应的宏观调控体系，在调控模式上必须实现以下转变

A．由原来的直接管理为主转向以间接管理为主
B．由原来的行政手段为主转向以经济手段为主
C．由原来的法律手段为主转向以行政手段为主
D．由原来的以指令性计划转向以指导性计划为主

答案

参考答案：A,B,D

单项选择题

我国法定面积计量单位包括平方米、（）、平方厘米、平方毫米。

A.立方分米

B.立方厘米

C.平方分米

D.立方毫米
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单项选择题

Frame Relay is simplified form of (66) , similar in principle to (67) , in which synchronous, frames of data are routed to different destinations depending on header information.

Packets are routed throught one or more Virtual Circuits known as (68) . Most Virtual Circuits are (69) , which means that the network provider sets up all DLCI connections at subscription time. (70) are also part of the Frame Relay specification. They privide a link that only lasts only as long as the session.

69（）

A．Permanent Circuits

B．Permanent Virtual Circuits

C．Switched Virtual Circuits

D．Switching Circuits
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