题目内容

箭形止回阀现场维护保养过程主要有()等。

A. 现场使用后用清水清洗
B. 用润滑脂润滑螺纹
C. 配齐护丝
D. 抢接的箭形止回阀,应装好顶开装置,并确认阀芯顶开杆已顶牢
E. 清洗保养好存放在钻台便于取放的位置

查看答案
更多问题

An anchored vessel on pilotage duty must show which light(s) at night? ()

A sternlight only
B. Anchor lights only
C. A white light over a red light only
D. A white light over a red light and anchor light

霍奇金病(HD)与非霍奇金淋巴瘤(NHL)的不同。下列哪种说法是错误的()

A. HD发病年龄较NHL为轻
B. HD淋巴结肿大较NHL常见
C. HD淋巴结外累及较NHL多见
D. HD依次播散,而NHL为跳跃式播散
E. NHL并发淋巴肉瘤细胞性白血病较HD常见

要做好接待工作心理准备,重要的是要学习礼仪常识,塑造自身良好形象。()

A. 正确
B. 错误

The TPC curve,one of the hydrostatic curves in a vessel’s plans,gives the number of tons().

A. necessary to change the angle of list 1°at a given draft
B. necessary to change trim 1 cm at a given draft
C. pressure per square cm on the vessel's hull at a given draft
D. necessary to further immerse the vessel 1 cm at a given draft

答案查题题库