Since Jonas Salk came up with his polio vaccine, infantile paralysis has virtual

游客2024-01-01 44

问题 Since Jonas Salk came up with his polio vaccine, infantile paralysis has virtually disappeared from the United States.

选项 A、surfaced with
B、raised the price of
C、discovered
D、elevated

答案 C

解析习语辨析come up with想出，提出，提供；B．raise the price of抬高……的价格；C．discover(首次)发现，发觉，找到；D．elevate举起，提拔。因此C为答案。

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In1954Dr.JonasSalkbegan______akilled-virusvaccineforpolio.A、testedB、ha