问题
单项选择题
全冠修复体采用龈上边缘的最主要优点是（）
A.不易附着菌斑
B.美观性好
C.边缘密合
D.对龈刺激小
E.不易附着牙垢
答案
参考答案：D
搜题请搜索小程序“爱下问搜题”
全冠修复体采用龈上边缘的最主要优点是（）
A.不易附着菌斑
B.美观性好
C.边缘密合
D.对龈刺激小
E.不易附着牙垢
参考答案：D
On Sundays, Li Lei gets up at six thirty. He has at eight. Then he helps his mother the housework（家务劳动）. At ten o’clock he leaves and goes shopping bike. At about eleven o’clock he comes home. He likes very much. He helps his mother with the cooking. They lunch at twelve. In the afternoon he often games with his friends. They have at six thirty. In the evening he does his homework. Sometimes, he TV. He goes to bed at nine.
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