A. 致伤物坚硬 B. 致伤物不太坚硬 C. 致伤物作用面较窄 D. 软组织较薄
A. 主机、键盘和显示器 B. 硬件系统和软件系统 C. 主机和外部设备 D. CPRAM和输入输出设备
After boarding the pilot B. After the pilot leaving the ship C. After the pilot going on board D. After taking the pilot