4岁小儿,曾有过多汗,碱性磷酸酶正常,严重“O”型腿,应给予
A.手术矫正B.做抬头展胸运动C.按摩腿外部肌群D.维生素D肌内注射E.口服维生素D及用钙剂
参考答案:A
The children were left _____ of a neighbor when they went on holiday.
A.in the charge
B.in charge
C.under charge
D.at charge
什么叫冷冻干燥保藏法?什么叫液氮保藏法?试简述其要点和主要优点。