A.He is Jack
B.This is Jack
C.She is Sue
D.You must have met each other before
A.Was; before
B.Is; before
C.Was; after
D.Is; after
A.exp.date
B.Validity
C.Stability
D.Storage life
E.Use before
失效期E.
失效期为
A.有效期
B.有效期为020215的药品
C.失效期为020515的药品
D.Expiry date
E.Use before
有效期为
A.有效期
B.有效期为020215的药品
C.失效期为020515的药品
D.Expiry date
E.Use before