问题
问答题 简答题
各种结构形式的防盗安全门在规定的破坏工具作用下,按其最薄弱环节能够抵抗非正常开启的净工作时间的长短分级是怎样规定的?
答案
参考答案:平开全封闭式防盗安全门、平开栅栏式、折叠栅栏式防盗安全门A级:15minA级:10minB级:30minB级:20minC级:45minC级:30min
各种结构形式的防盗安全门在规定的破坏工具作用下,按其最薄弱环节能够抵抗非正常开启的净工作时间的长短分级是怎样规定的?
参考答案:平开全封闭式防盗安全门、平开栅栏式、折叠栅栏式防盗安全门A级:15minA级:10minB级:30minB级:20minC级:45minC级:30min
阅读短文,完成下面的题目。 | |
We will have a basketball game tomorrow in the school sports center. The game is between our school team and the Star school team. It will start at four o'clock in the afternoon. Please come and cheer for the players.
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