Since Jonas Salk came up with his polio va
问题:
Since Jonas Salk came up with his polio vaccine, infantile paralysis has virtually disappeared from the United States.
A.surfaced with
B.raised the price of
C.discovered
D.elevated
Since Jonas Salk came up with his polio vaccine, infantile paralysis has virtually disappeared from the United States.
A.surfaced with
B.raised the price of
C.discovered
D.elevated