The elements of a compound occur in a fixed mass ratio.请问fix

The elements of a compound occur in a fixed mass ratio.请问fix The design of industrial fixed ratio gearboxes is a large su A.fix B.fixing C.fixed D.to fix the mass of 与 a mass of 有啥区别? 英语翻译A potter has a fixed volume of clay in the form of a cyl 请问A与B的比,怎么用英语表达?The ratio of A to B.The ratio of A and B.这两句 mass的用法the mass of 和 a mass of 有什么区别？ Matlab绘图In an assignment A(I) = B,the number of elements in ? In an assignment A(I) = B, the number of elements in B and Identify the compound preposition.Trudy ordered a salad in a The mass of a grade A steel cylinder manufactured in a facto the fix of a national day