患者,女,31岁。因幼儿时经常服用四环素而致全口四环素牙,影响美观要求脱色。行脱色治疗时,选用最适宜的药物是( )。
A campus emergency ______ occur at any time of the day or night, weekend, or holiday, with little or no warning.
免费的网站请分享给朋友吧