简述病原体在机体内发展的阶段性和引起机体组织损伤的机制。
When a DHCP server is configured, which two IP addresses should never be assignable to hosts?()
A. network or subnetwork IP address
B. broadcast address on the network
C. IP address leased to the LAN
D. IP address used by the interfaces
E. manually assigned address to the clients
F. designated IP address to the DHCP server
采用准分离式伴音系统的大屏幕彩色电视机,其图像和声音的公共通道包括()。
A. 高频头
B. 图像中放
C. AV切换电路
D. 画质改善电路
烤片机回潮区的顶棚上悬挂有较多水珠,导致小块的水渍烟叶现象的原因是()。
A. 蒸汽的含水量过大
B. 高压水泵压力不够
C. 加热铜管温度不够或没有
D. C都有可能