以下关于计算机网络的讨论中，正确的是( )。A．组建计算机网络的目的是实现局域网的

Although the bulk of industry resources and energies have focused on developing the fastest (1) or slickest (2) more and more mindshare is turning to the evolution of the computer interface. Advancements in the areas of input devices, (3) processing and vitual reality could lead to fundamental changes in the way human and computer interact. The technological battlefield of the future will be adding layers between the user and the raw machine to make the (4) as invisible as possible. (5) represents the next evolutionary step for the interface.

4（）

A．inconsistent

B．independent

C．interface

D．incompatible

什么是产褥感染？什么是产褥病率？

对减压馏程测定装置的真空泵的维护工作包括（）。

A.注油

B.清洗入口纱网

C.换油

D.换定子

试述蓝细菌的生物学意义。

水泥熟料中的主要矿物成份为（）、（）、（）、（）。