问题
选择题
Which of the following signs can be seen on the door of a shopping mall? [ ]
A.
B. 
C. 
D. 
答案
答案：C
搜题请搜索小程序“爱下问搜题”
Which of the following signs can be seen on the door of a shopping mall? [ ]
A. B. C. D.
答案：C