牙龈经常出血的,患夜盲症的人,患脚气病的人,缺乏的维生素分别是 [ ]
A.维生素A、B1、C
B.维生素B2、A、C
C.维生素C、A、B1
D.维生素C、A、B12
C
项目后评价是在经过一段时间的生产运营之后对上期决策,实施和( )情况进行总结评价。
A.投产竣工B.工程设计C.生产运营D.竣工决算
Where goods are to be dispatched by road, rail or air instead of by sea, the documentary credit will call for a road transport document or a rail transport document or an airway bill instead of().
A.a bill of exchange
B.a certificate of origin
C.a bill of lading
D.a certificate of insurance