矿砂船的特点是:(203227:第01章 船舶常识) (A-0,B-0,C-0,D-0,错误-0) A. 舱容小、双层底较高、采用高强度钢 B、舱容小、双层底较低、采用高强度钢C、舱容大、双层底较高、采用高强度钢D、舱容大、双层底较低、采用高强度钢
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举一反三
【单选题】The purpose of a temperature sensing device installed in the stack of a small automatically fired auxiliary steam boiler is to secure the oil burner .
A.
in the event of a flame failure
B.
in the event of a stack fire
C.
when the water level reach the crown sheet
D.
when the feed pump discharge pressure drops to a preset minimum