Cracking in concrete structure and its countermeasures Fatigue of concrete structure and its magnetic effect China's ethnic minorities crime and its countermeasures 并列题名：Fatigue of concrete structure and its magnetic effect 并列题名：China's ethnic minorities crime and its countermeasures management status and countermeasures regulation, anomy and its countermeasures current status and countermeasures theories, practice and the countermeasures