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【单选题】
cAMP与PKA相互作用后发生的下一步过程哪一项是正确的?( )A.
PKA的C亚单位进入细胞核引起有关基因转录
B.
PKA的R亚单位进入细胞核引起有关基因转录
C.
PKA的C和R亚单位彼此分离失去活性,从而使系统回复基态
D.
PKA的C亚单位使cAMP水解成AMP9从而使系统回复基态
E.
PKA的R亚单位使cAMP水解成AMP9从而使系统回复基态
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【简答题】五行学说用五行的生克乘侮关系说明五脏病变的相互影响,肝病及心称为________,肝病及肺____,肝病及肾____,肝病及脾_____。
【单选题】Which command is used to debug a ping command?（）
A.
debug icmp
B.
debug ip icmp
C.
debug tcp
D.
debug packet
【多选题】Regarding the extended ping command which of the statements below are true? (Select all valid answer choices)
A.
The extended ping command is supported from user EXEC mode.
B.
The extended ping command is available from privileged EXEC mode.
C.
With the extended ping command you can specify the TCP and UDP port to be pinged.
D.
With the extended ping command you can specify the timeout value.
E.
With the extended ping command you can specify the datagram size.
【单选题】Which statement about the ip classless router command is true?（）
A.
The ip classless command is enabled by default in recent versions of IOS.
B.
The ip classless command should only be enabled when static routing is being used instead of a routing protocol.
C.
The ip classless command should be enabled by the network administrator whenever RIPv1 or IGRP is being used.
D.
The ip classless command should be enabled by the network administrator whenever OSPF, RIPv2, or EIGRP is being used.
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