A.降低维生素C丢失B.降低维生素A丢失C.降低维生素E丢失D.降低维生素D丢失
A.补充铁B.补充蛋白质C.预防胎儿发生神经管畸形D.预防妊娠高血压
A.1.26MJ/d和800mgB.1.88MJ/d和1000mgC.1.88MJ/d和1200mgD.1.26MJ/d和1000mg