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【单选题】
细胞膜内电位由-70mV变为+30mV时称A.
极化
B.
去极化
C.
超极化
D.
反极化
E.
复极化
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反馈参考答案：
举一反三
【单选题】What is a benefit of Internet protocol (IP) telephony?（）
A.
Synchronizes password exchanges for call setup
B.
Eliminates the need for physical cabling in a TCP/IP network
C.
Enables two-way voice transmission over a packet-switched TCP/IP network
D.
Creates an encrypted tunnel for voice through a Transmission Control Protocol (TCP)/IP network
【简答题】IP(Internet Protocol)___________________
【简答题】IP 是Internet Protocol （网间网互联协议）的简写。
【单选题】What is a benefit of Internet protocol (IP) telephony?（）
A.
Synchronizes password exchanges for call setup
B.
Creates an encrypted tunnel for voice through a Transmission Control Protocol (TCP)/IP network
C.
Enables two-way voice transmission over a packet-switched TCP/IP network
D.
Eliminates the need for physical cabling in a TCP/IP network
【简答题】Internet Protocol(IP)
【单选题】Which protocol automates all of the following functions for hosts on a network: IP configuration, IP addresses, subnet masks, default gateways, and DNS server information?
A.
CDP
B.
SNMP
C.
DHCP
D.
ARP
E.
DNS
F.
None of the above
【简答题】简述Spark的特点。
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