在数据库的三级模式结构中,内模式有( )。
A.1个
B.2个
C.3个
D.任意多个
参考答案:A
一Why do you appreciate her help so greatly?
一Because her donation makes it possible for me the dog Lucky.
A.to having
B.have
C.to have
D.having
患者,男,40岁。双膝肿痛,证属风湿顽痹,拟用马钱子治疗,剂量应是()
A.60~120g
B.10~15g
C.3~5g
D.0.3~0.6g
E.0.06~0.1g