简述剪力栓钉连接的破坏形式。
①.栓钉杆被剪断;②.较薄的连接板被挤压破坏;③.板被压(拉)坏;④.板件端部被剪断;⑤.栓钉杆受弯破坏。
A campus emergency ______ occur at any time of the day or night, weekend, or holiday, with little or no warning.
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