管子的腐蚀是指管子烟气侧的()和管内的()。管子烟气侧的腐蚀又分为()和低温腐蚀。
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Application for a waiver of any requirements of the regulations for oil transfer operations must be submitted to the().
A. District Commander
B. Commandant
Captain of the Port
D. nearest Coast Guard office
《恐龙王诞生》这本书中,小恐龙王“雷”在复国救母途中遇到了三只龙,并成为了很好的组织。他们是?()
A. 霸王龙、鸭嘴龙、翼龙
B. 霸王龙、异特龙、剑龙
C. 三角龙、剑龙、翼龙
对诊断急性支气管炎最有价值的肺部体征是()对诊断支气管肺炎最有价值的肺部体征是()
A. 肺部呼吸音粗糙或有不固定的干湿啰音
B. 双肺可闻及哮鸣音
C. 背部两肺底及脊柱两旁听到较固定的中细湿啰音
D. 双肺可闻及支气管管状呼吸音
E. 双肺呼吸音减弱
For a ship not on an international voyage,an approved substitute for an impulse projected rocket-type line throwing appliance is a().
A. spring loaded line thrower
B. hand thrown buoyant line
C. shoulder-type line throwing gun
D. heaving line