46. With his own _____ Huang Jiguang, a fighting hero _____ the enemy's machine gun.

A．life; blocking

B．body; covered

C．body; blocked

D．body; stop

当顶板破碎或压力大时，用（）降柱

A.长柄工具

B.短柄工具

C.绞车拉回

D.以上均可