贮煤场的贮煤量较多时,煤堆上必须有一条推土机能进出煤场的安全通道,路面坡度低于(),宽度在5m以上。
参考答案:25°
I like to_____ movies. My brother likes to _____TV. [ ]
A. look; watch
B. see; watch
C. look at; see
D. watch; see
挂主接地线的程序?