简述跑车防护装置的定义。
参考答案：在倾斜井巷内安设的能够将运行中断绳或脱钩的车辆阻止住的装置或设施。
It can be inferred that flood plains, deltas, and stream channels (lines 13-14) are similar in which of the following ways
A．Animals rather than plants have been preserved at such location
B．Such locations are likely to be rich sources of fossil
C．Fossilized human remains are only rarely found in such location
D．Rapid sedimentation in such locations makes it difficult to locate fossil
图书编校质量“合格”的标准线是差错率未超过（）
A.1/10000
B.2/10000
C.3/10000
D.5/10000
