【单选题】陀螺仪主轴指北端在子午面东侧作上升运动,这是由于_____的作用。
【简答题】相对技术差异论揭示“两利相权取其重,两弊相权取其轻”。( )
【单选题】Our earth can only be effectively saved when ______ .
A.
people of all nations become conscious of the danger and make joint efforts.
B.
governments in developed countries can formulate more strict laws and regulations.
C.
more volunteers can be organized to help the refugees throughout the world.
D.
the living standards of citizens in developing countries can be greatly raised.
【判断题】叉车是最常用的具有装卸、搬运双重功能的装卸搬运设备。( )
【单选题】按照三视图的原理,建筑工程图纸分为建筑平面图、立面图和()。
【判断题】微倾式水准仪的使用步骤为置镜-粗平-瞄准-精平-读数。