【单选题】Some solid evidence proves that water really exists on Mars, but unfortunately, there is still no of life.
【单选题】患者,女,18岁,面部检查,无明显的异常,覆 10mm,覆盖2mm,上颌 和下颌 开 ,四个第一磨牙轻度Ⅲ类咬合关系,牙弓无拥挤,FMA42°下颌角141.5°,下颌支高度偏短。四个第一磨牙牙胚存在。有吮指习惯。
对此患者的拔牙设计为()
【单选题】患者,女,18岁,面部检查,无明显的异常,覆 10mm,覆盖2mm,上颌 和下颌 开 ,四个第一磨牙轻度Ⅲ类咬合关系,牙弓无拥挤,FMA42°下颌角141.5°,下颌支高度偏短。四个第一磨牙牙胚存在。有吮指习惯。
对此患者的主要治疗目标是()
【单选题】Scientific evidence proves that physical exercise always has positive influence on memory formation.
【单选题】Why do we use "it" as a formal subject?
A.
To maintain sentence balance.
B.
To make sentence components completed.
【单选题】一Why do we use a ________ bag to go shopping? 一Because it can ________ pollution. [ ]