[单选] 个人专栏一般由专栏作家个人经营，便于形成个人风格，形成个人的（）。

A vessel has been equipped with an oil lubricated stern bearing and is undergoing a routine dry-dock.Which of the following inspection should be made when the tail-shaft has been drawn?（） The overall condition of the bearing surface should be examined。 The shaft liner should be inspected for cracks and tested to insure a tight fit。 The stern tube should be tested for cracks with dye penetrant。 all of above。 A power-driven vessel，when towing astern，shall show（）. two towing lights in a vertical line。 a towing light in a vertical line above the sternlight。 two towing lights in addition to the sternlight。 a small white light in lieu of the sternlight。 GTR的应用特点和选择方法是什么？ 按照我国现行法律，以下哪种广告不得在大众传播媒体上发布（） 处方药。 医疗。 保健食品。 房地产。 GTO有哪些主要参数？其中哪些参数与普通晶闸管相同？哪些不同？ 个人专栏一般由专栏作家个人经营，便于形成个人风格，形成个人的（）。