生物活性最强的维生素D3是
A. 皮肤中7-脱氢胆固醇经紫外线照射转化而来的维生素D3
B. 自食物中摄取的维生素D3
C. 25-(OH)-D3
D. 1,25-(OH)2-D3
单词互译:航空摄影测量:( )terrestrial photogrammetry:( )近景摄影测量:( ) aerial photography:( )photographic scale:( )flight altitude:( )photographic principal distance:( )plane table photogrammetry:( )模拟摄影测量:( )解析摄影测量:( )数字摄影测量:( )full digital photogramertry:( )
What are 5D products?(中英文对照回答,手写并拍照上传)