熔接完成后取出光纤时,应小心压住皮线或尾纤,避免熔接点断裂。()
参考答案:对
二氢吡啶环上,3,5位取代基均为甲酸甲酯的药物是()
A.氨氯地平
B.尼卡地平
C.硝苯地平
D.尼群地平
E.尼莫地平
For an OSV not on an international voyage,an approved substitute for an impulse projected 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