代谢性酸中毒原发改变为( )
A.[HCO3-]增多B.[HCO3-]减少C.[H2CO3]增多D.[H2CO3]减少E.P(CO2)增高
参考答案:B
_______ anyone call, please tell him I'm not free. [ ]
A. Must
B. Can
C. May
D. Should
成品牙与雕刻蜡牙相比,优点是
A.硬度大
B.耐磨损
C.色泽好
D.操作简单
E.咬合关系好