7441 氟斑牙的颜色是（)A.黑色B.青黑色C.银灰色D.白垩色748

氟斑牙的颜色是() A.黑色 B.青黑色 C.银灰色 D.白垩色

答案解析

上一篇: 9649 要预防牙周病，洁牙后哪种症状属暂时现象（)A.遇冷热敏感、略有松动B.夜间出现牙痛C.牙龈出血D1450

下一篇: 8259They were determined to carry out the research at once.A.fetchedB.conductedC.attractedD.pu9389