问题
选择题
— ____________ do you like summer?
— Because I can swim. [ ]
A. Which
B. What
C. Why
答案
答案：C
搜题请搜索小程序“爱下问搜题”
— ____________ do you like summer?
— Because I can swim. [ ]
A. Which
B. What
C. Why
答案：C
，则直线2xcosα+3y+1=0的倾斜角的取值范围（）。