单选题Temperature and moisture characteristics are modified in a warm or cold air mass due to （）.Apressure changes in the air massBmovement of the air massCthe heterogeneous nature of the air massDupper level atmospheric changes
单选题
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
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