单项选择题 Entering from sea,a daymark on the port side of the channel would be indicated on a chart by a（）.

单项选择题 When connecting the tow bridle to a tug, the end of the bridle is passed with a（）.

单项选择题 According to MLC,the minimum hours of rest shall not be less than 10 hours in any 24-hour period,and（）hours in any seven-day period.