烹饪中维生素大致损失顺序为()。
A.VC>VA>VB1>VE
B.VB1>VC>VE>VA
C.VC>VE>VA>VB1
D.VC>VB1>VA>VE
参考答案:B
You can't go out and play ______ you've done your homework. [ ]
A. when
B. since
C. while
D. until
可摘局部义齿设计中,前腭杆的要求是
A.厚度1.5mm
B.宽度5~6mm
C.位于上腭腭皱区
D.离开龈缘至少6mm
E.表面光滑