【单选题】Before assuming command of a vessel,the new OOW must discuss with the one being______all important operational features of the ship
【判断题】β-内酰胺类抗生素包括青霉素类和头孢菌素类,由于其结构中都含有β-内酰胺环,故称为β-内酰胺类抗生素。( )
【单选题】Assuming you build networks to exact specifications, what is the recommended maximum length a 10BaseT cable can be before it has to be segmented or repeated?