内排屑钻头钻深孔时，切削液在高的压力下由孔壁与钻杆间的缝隙进入钻孔切削区，将切屑带走，经（）排出。
参考答案：钻杆内孔
与巴黎公社相比，俄国十月社会主义革命的特点是
①无产阶级暴力夺取 * * ②有成熟的无产阶级政党的领导
③以夺取大城市为主要目标④以马克思主义为指导 [ ]
A．①④
B．②③
C．①③
D．②④
Tom likes sitting close to TV, so his parents try to _____ him _____ the bad habit.
A．treat; of
B．treat; with
C．cure; of
D．cure; with
