一般防护罩不准脚踏和站立,必须做平台或阶梯时,应能承受( )N的垂直力。A:1 000 B:1 200 C:1 500 D:2 000

作者: tihaiku 人气: - 评论: 0
问题 一般防护罩不准脚踏和站立,必须做平台或阶梯时,应能承受( )N的垂直力。
选项 A:1 000 B:1 200 C:1 500 D:2 000
答案 C
解析

相关内容:防护罩,平台,阶梯,应能,承受

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