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it has proved or it has been proved

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it has proved or it has been proved
Which one is correct?
(1) or (2)
1)
Preventative medicine has proved to be the most effective way of reducing the incidence of fatal childhood diseases.
2)
Preventative medicine has been proved to be the most effective way of reducing the incidence of fatal childhood diseases.
it has proved or it has been proved
选2 被动语态,表示“被证明、被证实”
不过,用过去分词proven的表达会更多一些：has been proven,表示“被证明、被证实”的状态:
Preventative medicine has been proven to be the most effective way of reducing the incidence of fatal childhood diseases.
it has proved or it has been proved It has been proved that qats will. [D41] It has been proved ______ eating vegetables in childho It has been proved ____taking exercise regularly does good t It has been proved ___ eating vegetables in childhood helps many a successful story has proved it. 英语翻译It has been proved that by carefully controlling the rat It has been proved again and again that whatever the govemen It has been proved that his theory is practical 怎么变为 His the 65806：it has also been proved by scientific research that ch 选哪个,请给出原因.A.proving B.proved C.was proved D.has been proved It has been proved that...请帮我对这个主语从句举个例句并释意谢谢