When abandoning ship and jumping into the water from a substantial height without a life jacket,you should().
A. dive head first,using your hands to break the surface of the water
B. hold your arms firmly at your sides and jump feet first
C. jump feet first,covering your nose and mouth with one hand and grasping the opposing upper arm with the other
D. jump feet first,holding your knees to your chest
财政会计办理年终清理结算的主要事项有()。
A. 核对年度预算、清理本年预算收支
B. 组织征收机关和国库进行年度对账
C. 清理核对当年拨款支出
D. 清理往来款项
E. 清理财政周转金收支、进行年终财政结算
一螺纹的标注为M24×1.5,表示该螺纹是()螺纹,其大径为(),螺距为1.5,旋向为右。
地磁传感器安装有几个?安装在什么地方?
A. 1,在地板下
B. 1,在垂尾上
C. 2,在垂尾
D. 2,一个左翼,一个在右翼