凡离地面()米(楼板)以上的情况下操作即为高空作业。
参考答案:2
The radio ______ the rain will stop later on. [A] told [B] reads [C] says
外模标称尺寸为19.06(公差为0.01mm/0.00mm)与之配对的芯头标称尺寸为14/17.06,本道次壁厚为()mm
A.2
B.0.5
C.3.03