— Help yourself to some more soup.

—       . [ ]

A. It doesn't matter

B. It's my pleasure

C. I'm full, thanks

D. Very well, thank you

磁性附着体固位的覆盖义齿优点是（）

A.提高咀嚼效率

B.缩短患者适应义齿时间

C.提高义齿固位力

D.义齿基托可适当减小利于发音

E.以上都对