A.碳酸鈉 B.碳酸氫鈉 C.硫酸鈉 D.硫代硫酸鈉
A.0.38~0.76 B.0.48~0.66 C.0.38~0.66 D.0.48~0.76
A.地面遙感 B.海上遙感 C.航空遙感 D.航天遙感