能够消化淀粉的结构是下列哪一组( )
A:口腔和小肠
B:胃和小肠
C:小肠和大肠
D:口腔和大肠
---The beef in this restaurant tastes nice.
--- You can't find better beef in any other restaurant.
已知正数a,b满足2a+b=1,则4a2+b2+ab的最大值为( )