鼠标的操作有哪几种（）。 指向。 单击。 右击。 双击。 拖动。
During the deck repair,（） should be measured firstly before tail shaft is drawn out. the sinking of tail shaft。 the clearance of stern bearing。 the total flexure of both end bearing。 main engine crankshaft deflectio。
Every vessel shall（）maintain a proper look-out by sight and hearing as well as by all available means appropriate in prevailing circumstances and conditions so as to make a full appraisal of the situation and of the risk of collision. in fog。 at night。 in narrow fairway。 at all time。
To ensure the quality of dock repair, C/E should know very well （） the repair standard of main docking repair item。 the special tool for repair item。 the skill of repairer。 the status of docking repair equipment。
（）是计算机病毒的常见传播方式。 通过磁盘拷贝来交换文件。 从网络复制文件到硬盘上。 打开电子邮件来接收文件。 用光驱从正版光盘上拷贝文件。
跨省市总分机构企业所得税收入征缴和分配管理的基本方法有哪些（）
