承载能力极限状态包括构件和连接的强度破坏、疲劳破坏和因过度变形而不适于继续承载的状态。
参考答案：对
Johnson had made up his mind to give it up，but on______second thought he determined to try______ third time.
A．/；a
B．/；/
C．a；a
D．the；a
若一台微机感染了病毒，只要删除所有带毒文件，就能消除所有病毒。()
A．正确
B．错误
