牺牲阳极与钢铁相连时,()首先失去电子。A、钢铁 B、牺牲阳极 C、导线 D、 发布时间:2017-09-21 03:02 │ 来源:www.tikuol.com 题型:单项选择题 问题: 牺牲阳极与钢铁相连时,()首先失去电子。A、钢铁 B、牺牲阳极 C、导线 D、填包料
题型:单项选择题 76. (1) is a channel’s capacity which directly reflects the data transfer rate of the channe1. (2) functions in a NetWare network which is used to define addressing schemes. (3) is a network layer device that supports multiple LAN interfaces and segments LANs into smaller collision and broadcast domains. (4) is the popular LAN developed under the direction of the IEEE802.3. (5) is a device which enables digital microcomputers to communicate across analog telephone lines.(2)A.NetBEUIB.IPC.IPXD.NCP 查看答案
题型:单项选择题 结束中美长达20多年的对抗,两国关系开始走向正常化的事件是( )A.1971年26届联大恢复中国的合法席位B.尼克松首次访华,上海公报的发表C.20世纪70年代末中美正式建立外交关系D.1978年中美建交公报的发表 查看答案
题型:单项选择题 某细胞正常状态时的静息电位为-60mV,当被某病毒感染后,某一时段的静息电位变为-48mV。其主要原因是影响了()A.细胞膜完整性B.ATP酶活性C.Na+-K+泵D.钙离子通道 查看答案