How should you signal the crane operator to raise the boom and lower the load?（）.<br>A:Extend arm with the palm down and and hold this position rigidly<br>B:Place both fists in front of the body with the thumbs pointing outward each other<br>C:Clasp hands in front of you body<br>D:Extend arm with the thumb pointing up, and flex the finger s in and out for as long as the load movement is desired

How should you signal the crane operator to raise the boom and lower the load?（）.
A:Extend arm with the palm down and and hold this position rigidly
B:Place both fists in front of the body with the thumbs pointing outward each other
C:Clasp hands in front of you body
D:Extend arm with the thumb pointing up, and flex the finger s in and out for as long as the load movement is desired

出自：海船船员证

提示：
同一【IP】的非会员用户每天可免费获取10次答案

收藏本站【zk.995w.com】，下次访问不迷路

本站试题总数:【10252937】个 (题库试题定时更新)