能调节全身阳经的经脉是哪些？（）
A.督脉
B.冲脉
C.带脉
D.阳跷脉
E.阳维脉
参考答案：A, E
下列选项中，属于癌前病变的是 ( )
A．皮肤隆凸状纤维肉瘤B．慢性萎缩性胃炎伴肠腺化生C．皮肤鲍温(Bowen)病D．皮样囊肿E．乳腺纤维腺瘤
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
