问题
选择题
Who is this man? He is my father and he ____________.[ ]
A. 3 books
B. looks strong
答案
答案：B
搜题请搜索小程序“爱下问搜题”
Who is this man? He is my father and he ____________.[ ]
A. 3 books
B. looks strong
答案：B
）在镍催化剂作用下加1 mol 氢气转变成乳酸，乳酸的结构简式是__________ 。