维生素A的主要来源是()。
A.马铃薯
B.梨
C.小麦
D.动物肝脏
参考答案:D
. You had better take enough money with _________ while you ___________.
A.yourself, were shopping
B.yourself, are shopping
C.you, are shopping
D.you, were shopping
步长肝康宁的剂型为()
A.片剂
B.水丸
C.冲剂
D.注射剂