Before personnel are lifted from a vessel in a personnel basket，the vessel should be（）. ["directly under the boom","moving away from the boom","stopped dead in the water","tied to the boom"]
机床导轨的直线度误差，在水平面与在垂直面哪个对加工精度影响大？为什么？
人类行为和生物性不表现在（） ["与遗传相关","以生理形态和功能为发展前提","具有本能行为","参与社会的行为"]
何谓工艺系统？
顾客定制适用于（）。 ["探索型产品","经验型产品","信赖型产品","标准化产品"]
品类管理流程的发展演变？
