皮皮学，免费搜题
登录
搜题
【多选题】
当前中国乃至全世界的制造业都面临着哪些挑战?( )A.
时间
B.
众多企业没有很好的办法可以有效提升生产效率
C.
工厂的智能控制
D.
市场需求不断变化
手机使用
分享
复制链接
新浪微博
分享QQ
微信扫一扫
反馈参考答案：
举一反三
【单选题】A vessel aground at night is required to show two red lights in a vertical line as well as （）.
A.
not under command lights
B.
restricted in her ability to maneuver lights
C.
anchor lights
D.
sidelights and a sternlight
【简答题】A horizontal plane at a point is the plane that is perpendicular to the vertical line at the point.There is only one horizontal plane through a given point.
【单选题】[7-41]The ___is the point at which a vertical line through the heeled ship’s center of buoyancy intersects with the vertical line throu
A.
metacenter
B.
center of buoyancy
C.
Center of gravity
D.
center of flotation
【单选题】A vessel is carrying three lights in a vertical line. The highest and lowest of these are red and the middle light is white. Which statement is always TRUE?
A.
During the day，she would display three balls in a vertical line
B.
If making way，she would show masthead lights at night
C.
If at anchor，she need not show anchor lights while displaying identifying lights
D.
Her fog signal would consist of a rapid ringing of a bell for five seconds every minute
相关题目：
参考解析：
知识点：
题目纠错 0
发布
