东晋、南朝时江南地区经济得以迅速发展的主要原因是[ ] A．

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问题选择题

东晋、南朝时江南地区经济得以迅速发展的主要原因是[ ]

A．南方生产工具先进

B．南方自然条件好

C．北方农民南迁，带来先进的生产技术

D．南朝统治者施行仁政

答案

答案：C

单项选择题

which descnption is NOT true

A． Personal computer has not the features of the larger system．

B． Large systems offer higher processing speeds for user and return more data than PCs．

C． Output devices take output results from the CPU in machine-coded form and conven them into a form that used by people.

D． The input/output devices and auxiliary storage units of a computer system are called peripherals.

单项选择题

( )是编制初步设计概算的依据。

A．投资估算

B．项目概算

C．总投资计划

D．项目论证