题目内容

ARPAnet wascreated by theDepartment ofDefense in 1969 to facilitate communications in the event of a nuclear attack.

A. 对
B. 错

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TheInternet offers a range of services to users.

A. 对
B. 错

TCP/IPisacommunicationsprotocolused to transfer digital data around theInternet.

A. 对
B. 错

IPis responsible for moving packet of data from node to node whileTCPis responsible for verifying the correct delivery of data from client to server.

A. 对
B. 错

当有数种溶剂的蒸汽或者数种刺激性气体同时在室内放散时，计算全面通风量，下列哪些说法不正确？

A. 规定的房间换气次数
B. 将毒性最大的有害物稀释到允许浓度所需要的空气量
C. 将各种气体分别稀释到允许浓度所需要空气量的总和
D. 将各种气体分别稀释到允许浓度，按其中所需要量大的通风量