问题
选择题
People don’t work working．It’s not work itself that’s important to them but such a joy in doing work well．
A．to the advantage of
B．in harmony with
C．not to mention
D．for the sake of
答案
答案：D
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位置低于咬合面，牙冠缩短，松动Ⅰ°，龈有少许撕裂，牙外伤的诊断是（）