治疗心室颤动，下列哪些措施最有效()
A．人工呼吸
B．心脏按压
C．电击除颤
D．静脉推注利多卡因
E．心脏内注射肾上腺素
参考答案：C
简述重力式码头的特点？
Generally，when lifting an inflatable liferaft back aboard ship you would use the（）.
A.towing bridle
B.main weather cover
C.external lifelines
D.righting strap
