籽棉的清理是利用各种清理设备（）中所含杂质的工序的总称。
In astern towing，a tow span，also called the tow bar or towing arch，is used to（）.
A. insure that the hawser leads directly aft as it passes over the stern of the towing vessel
B. increase the stability of the towing vessel by raising the hawser off the deck
C. reduce chafing of the towing hawser
D. prevent fouling of the hawser on deck gear located on the stern of the towing vessel
彩色电视机中，高频调谐器输出为中频图信号（）和伴音信号（）。
将人员的选拔、使用、考评和培训作为紧密联系整体的原则是指（）
A. 职务要求明确原则
B. 责权利一致原则
C. 公平竞争原则
D. 用人之长原则
E. 系统管理原则
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