为取得倾斜基牙固定桥的共同就位道,不能采取的方法是()
A.牙体预备
B.套筒冠
C.采用硬度较低的材料
D.正畸治疗
E.改变固位体设计
参考答案:C
I don't know _____ the future holds in store for me, but I'll face the storms of life bravely. [ ]
A. how
B. where
C. that
D. what
腐植酸类肥料