锚喷支护：锚杆眼的方向要尽量与岩层面或主要裂隙面垂直。（）
参考答案：对
Food supplies in the flood-stricken area ______. We must act immediately before there’s nothing left.
A．have run out
B．are running out
C．have been run out
D．are being run out
轨道平车是由轨道车牵引，载重量为（）及以下的专用平车。
A、60t
B、50t
C、30t
D、24t
