()refers to the angle between true North and the heading line of the ship.
A. True position
B. True meridian
C. True course
D. True bearing
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能源结算页面中显示已合计时间的先决条件?()
A. 能源
B. 开始时间
C. 结束时间
D. 核算单元名称
Wristpin bearings are difficult to lubricate because of their oscillating motion and()
A. their free-floating design
B. their relatively small size
C. the reciprocating motion of the piston
D. their position in the lubrication system
(),印度图书馆学家()的著名论著()问世。他明确提出了()。