题目内容：
由上向下掘进下山，装岩、运输、排水工作都比较困难，在安全上要特别注意预防 事故。
参考答案：
选择题：由上向下掘进下山，装岩、运输、排水工作都比较困难，在安全上要特别注意预防 事故。
- 题目分类：河南理工大学-采矿工程-井巷工程
- 题目类型：选择题
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He was knocked down by a car and badly ________.
He was knocked down by a car and badly ________.A injuredB damagedC harmedD ruin
倾斜巷道施工中，为了防止跑车事故造成工作面人员伤亡，应在距工作面尽可能近的适当位置设置 。
倾斜巷道施工中，为了防止跑车事故造成工作面人员伤亡，应在距工作面尽可能近的适当位置设置 。
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