Any alteration of course and/or speed to avoid collision shall，if the circumstances of the
A. Be large enough to be readily apparent
Be a succession of small alterations
C. Be with due regard to the power and speed of the vessel
D. Leave sufficient room for the other vessel to take action
钢结构规范GB50017-2003规定的轴心压杆的稳定系数φ,与钢种、截面面积和杆件长细比有关。()
此时最适宜的处理是
A. 佩戴疝
B. 择期手术治疗
C. 试行手法还纳
D. 紧急手术
E. 应用抗生素
病人用力排便时，疝块突然增大不能回纳，伴有局部疼痛和压痛，此时该疝的临床类型属于
A. 易复性疝
B. 难复性疝
C. 嵌顿性疝
D. 滑动性疝
E. 绞窄性疝
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