问题
选择题
My parents getting up early on weekdays [ ]
A. used to
B. be used to
C. was used to
D. are used to
答案
答案：D
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My parents getting up early on weekdays [ ]
A. used to
B. be used to
C. was used to
D. are used to
答案：D
缺失，余留牙正常，可摘局部义齿修复，基牙
，采用弯制卡环
为三类导线，应采用哪类卡环（）