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【单选题】
推车工推车时，一人一次只准推一辆车，同向推车的间距，巷道坡度在5‰以下时，不得小于（）m。
A.
5
B.
10
C.
15
D.
20
参考答案：
参考解析：
刷刷题刷刷变学霸
举一反三
【单选题】Entertainment in LondonBuying Books Londoners are great readers. They buy vast numbers of newspapers and magazines and even of books especially paperbacks, which are still comparatively cheap in spite...
A.
It’s to the cast of London.
B.
It’s street of bookstores.
C.
It’s a center for second-hand books.
D.
It’s where worthless books are sold.
【单选题】人工挖掘土方作业过程中，作业人员相互间必须保持足够的安全距离：前后作业，两人间距不小于(C)m;左右作业，两人间距不小于( )m。
A.
1;
B.
2;
C.
3;
D.
4;
E.
5;