水利水电施工企业应及时拆除已报废的设备，可以将报废设备留在施工现场，等完工后与其他设备一起退场。
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A vessel using a traffic separation scheme shall（）.
A. only anchor in the separation zone
B. cross a traffic lane at as small an angle as possible
C. avoid anchoring in areas near the termination of the scheme
D. utilize the separation zone for navigating through the scheme if she is impeding other traffic due to her slower speed
在足球比赛中，防守是获得胜利的主要方法。
A. 正确
B. 错误
镜架的弯点长是指镜腿弯点到镜腿尾点的距离。
A. 正确
B. 错误
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