问题
选择题
Look! There are _______ on the desk. [ ]
A. four glasses of milk
B. four glasses of milks
C. four glass of milk
D. four glass of milks
答案
答案：A
搜题请搜索小程序“爱下问搜题”
Look! There are _______ on the desk. [ ]
A. four glasses of milk
B. four glasses of milks
C. four glass of milk
D. four glass of milks
答案：A
-1，1）处的法线方程是（）。
