单项选择题
Temperature and moisture characteristics are modified in a warm or cold air mass due to （）.
A.pressure changes in the air mass B.movement of the air mass C.the heterogeneous nature of the air mass D.upper level atmospheric changes
单项选择题 Please wireless to let me know （） I am to anchor or to meet pilot．
单项选择题 Place names used should be those （）.
单项选择题 Pilot ladder is （） on port side．
