How should you signal the crane operator to raise the boom and lower the load?（）. Extend arm with the palm down and and hold this position rigidly。 Place both fists in front of the body with the thumbs pointing outward each other。 Clasp hands in front of you body。 Extend arm with the thumb pointing up, and flex the finger s in and out for as long as the load movement is desired。
问卷的形式问题，其中（），又叫开放式问题，就是给出一个问题让被调查者自由回答，而不给出任何答案。 模糊问题。 非限定问答式问题。 限定回答式问题。 清晰问题。
简述研究营销环境的意义。
要求在图上能表示出0.5m的精度，则所用的测图比例尺至少为（）。 1/500。 1/5000。 1/50000。 1/10000。
How should you signal the crane operator to raise the boom?（）. Extend arm with the thumb pointing up and flex the fingers in and out。 Place both fists in front of the body with the thumbs pointing upward。 With forearm vertical and forefinger pointing up,move hand in small horizond circles。 Extend arm with the fingers closed and thumb upward。
配电运维班组之间，配电运维与变电、营销、用户管理之间界限划分原则上按（）分界点进行分界。
