问题
单项选择题
At the moment our technology is more advanced than theirs, but they are（）fast.
A.catching up
B.catching on
C.catching at
D.catching out
答案
参考答案：A
搜题请搜索小程序“爱下问搜题”
At the moment our technology is more advanced than theirs, but they are（）fast.
A.catching up
B.catching on
C.catching at
D.catching out
参考答案：A
咬合面中央见一牙本质轴，叩痛（+++），Ⅰ°松动，对温度测验和电活力测验均无反应，颊侧牙龈充血，尚无局限性膨隆，扪痛较重，深部有波动感。该患牙恰当的临床处置是（）