某患者做的10例窝沟封闭,仅1周后就有4例脱落了,主要原因是
A.光固时间短
B.酸蚀面积太小
C.牙面清洁不彻底
D.酸蚀时间不够
E.酸蚀后唾液污染
参考答案:E
下列配对哪项正确()
A.雀斑-日晒后加重
B.黄褐斑-与妊娠无关
C.黑变病-常染色体显性遗传病
D.白癜风-皮损部位黑素细胞不减少
His heavy drinking and fond of gambling, makes him a poor role model.
A. and fact that he gambles B. and that he gamblesC. and he gambles which D. and gambling