Liu Ying is good at singing. She sings ________ the famous singer.

A．as well as

B．as good as

C．as better as

D．as the best as

患儿，5岁，右下乳磨牙面龋坏，未有自发痛和叩击痛，医生决定采用ART修复该牙，并告知患儿家长，患儿不能用该牙咀嚼的时间是修复后（）

A.半小时内

B.1小时内

C.5小时内

D.12小时内

E.24小时内