管沟敷设时,在沟口()m处应设支(吊)架,热力小室两侧洞I=1处必须设置()支架。
A.0.5;滑动
B.1;导向
C.0.5;导向
D.1;滑动
参考答案:A
When I was a child, I used to ______ chocolate. [ ]
A. liking
B. like
C. liked
D. likes
下列哪项属于牙体缺损的病因()
A.龋病
B.外伤
C.磨耗
D.发育畸形
E.以上均是