15.生產13N-ammonia,使用下列何種靶原料?
(A)16O氧氣
(B)18O氧氣
(C)16O水含微量乙醇
(D)18O水含微量乙醇
答案:登入後查看
統計: A(116), B(93), C(588), D(181), E(0) #3283235
統計: A(116), B(93), C(588), D(181), E(0) #3283235