题型:选择题 It was _____________ back home after the experiment.A.not until midnight did he goB.until midnight he didn’t goC.not until midnight that he wentD.until midnight when he didn’t go 查看答案
题型:单项选择题 某患者自述牙齿从小就有花斑,而且同村居民也有类似表现。检查见全口牙釉面均可见不同程度的散在黄褐色及白垩状斑,探牙面光滑而硬,无实质性缺损。该患者的牙病诊断是A.猛性龋B.氟斑牙C.静止性龋D.四环素牙E.釉质发育不全症 查看答案