铁水液面计操作的作用是（）。
A. 测量铁水罐液面位置
B. 测算实际出铁量
C. 满量报警
The"Lost Generation"refers to those who（）
A. have no ambition in life
B. are physically and spiritually impotent
C. are homeless
D. are expatriate
What does a SART signal sound or look like?（）
A. It transmits "SOS" and the vessel's name and position in slow speed Morse Code
B. It will appear on a radar unit's PPI as a line of dots radiating outward with the innermost dot indicating the SART's position
C. It will appear on a radar unit's PPI as a line of dots radiating outward with the outermost dot indicating the SART's position
D. None of the above
对数据表进行筛选操作的结果是将（）
A. 满足条件的记录保存在新表中
B. 不满足条件的记录从表中隐藏
C. 不满足条件的记录从表中删除
D. 不满足条件记录保存在新表中
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