问题
选择题
A: What are you talking about?
B: About to use search engines. [ ]
A. where
B. how
C. which
D. what
答案
答案：B
搜题请搜索小程序“爱下问搜题”
A: What are you talking about?
B: About to use search engines. [ ]
A. where
B. how
C. which
D. what
答案：B
面深龋，龋蚀范围稍广，腐质软而湿润，易挖除，但很敏感。测牙髓活力同正常牙，叩（-）。