《煤矿安全现程》规定：轨道坡度大于多少时严禁人力推车？ A．9‰ B．7‰
题型：单项选择题
问题：
《煤矿安全现程》规定：轨道坡度大于多少时严禁人力推车？
A．9‰
B．7‰
题型：单项选择题
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1. | Usually I write an e-mail to my friends. But today I'm . Because my computer is broken. |
2. | I am . |
3. | I'm . Because today is Children's Day. |
4. | I like summer. I like to . |
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