单项选择题
女，45岁。右上第一磨牙牙周反复肿痛来诊，初诊为：慢性牙周炎。X线片显示：环绕右上第一磨牙牙根的白色阻射线消失。这表明组织有破坏的是( )
单项选择题 Which of the following is NOT given as a feature of the old French way of life
单项选择题 Which of the following best states the main idea of the passage
单项选择题 Which of the following is NOT true about Frenchmen
