A、<span style="FONT-FAMILY: ; FONT-SIZE: 10.5pt">防止结构倒塌</span>
B、<span style="FONT-FAMILY: ; FONT-SIZE: 10.5pt">防止结构发生破坏</span>
C、<span style="FONT-FAMILY: ; FONT-SIZE: 10.5pt">防止非结构部分发生过重的破坏</span>
D、<span style="FONT-FAMILY: ; FONT-SIZE: 10.5pt">防止使人们惊慌</span>