单项选择题
A.the actual depth B.added to or subtracted from the charted depth C.multiplied by the charted depth D.divided by the charted depth
To develop maximum anchor holding power，the optimum ang...
单项选择题To develop maximum anchor holding power，the optimum angle between the anchor’s shank and the mooring lines is（）.
A.0 degrees B.10 degrees C.20 degrees D.30 degrees
There is something wrong with our radar．All kinds of ob...
单项选择题There is something wrong with our radar．All kinds of objects can’t be clearly（）within the definite range.
A.shown B.expressed C.appeared D.displayed
There is plenty of（）at this area.A.a roomB.roomC.roomsD...
单项选择题There is plenty of（）at this area.
A.a room B.room C.rooms D.the room
