“（回归方程的）阶次从1,2和3中挑选”英语怎么说?Theorderoftheregressionequationissellectedfrom1,2and3.还是Theorderoftheregressionequationissellectedfrom1st,2ndand3rd.阶次是1。Theorderisthe1st.

Question

“（回归方程的）阶次从1,2和3中挑选”英语怎么说?
The order of the regression equation is sellected from 1,2 and 3.
还是
The order of the regression equation is sellected from 1st,2nd and 3rd.
阶次是1。
The order is the 1st.

Answer 1

肯定第一个,from后只用数字,不用序数词