第31题: [单项选择]A METHOD OF TOWING VESSELS THROUGH POLAR ICE BY MEANS OF ICEBREAKING TUGS WITH A SPECIAL STERN NOTCH SUITED TO RECEIVE AND HOLD THE BOW OF THE VESSEL TO BE TOWED defines(). A. Towing operations B. Rigid coupled towing C. Close coupled towing D. Hard coupled towing 参考答案:C
第32题: [单项选择]注射吸收差,只适用于诊断与过敏试验() A. 静脉注射 B. 皮下注射 C. 皮内注射 D. 鞘内注射 E. 腹腔注射 参考答案:C