【C9】
A. involved in
B. shocked by
C. exhausted by
D. combined in
【C19】
A. dotting
B. carrying
C. inserting
D. rising
【C13】
A. stiff
B. personal
C. crowded
D. comfortable
______ are changes on charts due to changes in hydrography,topography,construction,removal
A. revised edition
B. new edition
C. small corrections
D. source data