The boss didn’t accept the reason for her being absent for the meeting_________ she didn’t know there was  a meeting and __________100yuan from her salary this month.

A．why; kept back

B．that; kept back

C．where; keep out

D．because; keep out

一患者下颌缺失，面2度龋、近中舌向倾斜、不松动，余留牙牙石2度，左侧下颌隆凸明显、倒凹大，舌侧前部牙槽骨为斜坡型，口底深，上颌牙完全正常

此患者需如何确定颌位关系（）

A.在石膏模型上利用余留牙直接确定

B.用蜡记录确定

C.用蜡堤确定正中位

D.用蜡堤确定正中位，并重新确定垂直距离

E.以上方法都可以