单项选择题
During the month of October the Sun’s declination is（）.
A.north and increasing B.north and decreasing C.south and increasing D.south and decreasing
单项选择题 During the manufacture of line，yarns are twisted together in the（）.
单项选择题 During the day，a vessel picking up a submarine cable shall carry（）.
单项选择题 During the day，a dredge will indicate the side on which it is safe to pass by displaying（）.
