重介旋流器的分选密度调节在生产中主要是通过()来调节。
A. 煤泥的含量
B. 悬浮液的密度
C. 磁铁矿粉密度
D. 底流口或溢流口直径
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滚装客船为满足一周一次消防救生演习的要求,定为每逄星期三都演习。
A. 正确
B. 错误
If help has not arrived in 10-12 hours after abandoning a vessel in a rescue boat,you should ().
A. go in one direction until the fuel runs out
B. steer a course for the nearest land
C. steer a course for the nearest sea lane
D. shut down the engines if installed and put out the sea anchor
春温初起身不热甚,心烦懊恼,坐卧不安,欲呕不得呕,舌苔微黄,脉数,治宜()
A. 栀子豉汤
B. 凉膈散
C. 黄芩汤
D. 白虎汤
E. 黄连解毒汤