()of this deratting exemption certificate is hereby extended until 4th 0ct.1988 as the vessel is laden with cargo.
A. Validity
B. Valid
C. Validation
D. The coming into force
《建筑设计防火规范》GB50016-2006适用于下列()等新建、扩建和改建的工业与民用建筑。
A. 九层及九层以下的居住建筑(包括设置商业服务网点的居住建筑)和建筑高度小于等于24m的公筑
B. 单层主体建筑高度超过24m的体育馆、会堂、剧院等公共建筑
C. 单层、多层和高层工业建筑
D. 地下民用建筑
E. 人民防空工程
Which vessel may show three lights in a vertical line,the top and bottom being red and the middle being white? ()
A vessel engaged in diving operations
B. A pilot vessel
C. A vessel trawling
D. All of the above
机油泵主被动齿轮啮合间隙的检修(拆卸前或装配后进行),用厚薄规在互成120°的()。