聚合氯化铝（） A.腐蚀性小、成本低、适宜pH值较宽，形成絮状体快 B.腐蚀性小、成

The Internet is a (66) network of networks which interconnects (67) ranging from the simplest personal computers to the most sophisticated mainframes and supercomputers. This network of networks is used for an extraordinary range of purposes long distance collaborations, retrieving free software and documents, (68) library catalogs, (69) in to supercomputers - the list of current Internet activities and (70) is large and the range of possible future applications is as unlimited as our imagination.

A．logging

B．going

C．coming

D．achieving

Word提供的替换功能一般用于以新内容替换文档中原有的内容。（ ）

三米直尺测定路面平整度的指标是（）。

A.最大间隙

B.均方差

C.VBI

D.IRI

下列哪些建筑、储罐和堆场的消防用电，应按二级负荷供电( )

A．室外消防用水量超过30L/s的工厂、仓库

B．室外消防用水量超过35L/s的易燃材料堆场

C．甲类和乙类液体储罐或储罐区

D．可燃气体储罐或储罐区

流行性乙型脑炎反复惊厥或抽搐的原因是（）

A.高热

B.痰阻及缺氧

C.脑实质伤害

D.脑水肿、颅内高压

E.低血压、休克