苏俄为什么实施新经济政策？实施新经济政策取得了什么成效？

    _______________________________________________________________________________________

    _______________________________________________________________________________________

    _______________________________________________________________________________________

    _______________________________________________________________________________________

    _______________________________________________________________________________________

    _______________________________________________________________________________________

环氧乙烷健康危害不包括（）

A.刺激眼、皮肤

B.引起哮喘

C.致癌

D.皮肤脱脂

E.记忆力减退