箭头卡环最常用于()。
A.中切牙
B.侧切牙
C.尖牙
D.双尖牙
E.第一磨牙
参考答案:E
急性肾衰竭多尿期每日尿量达多少以上()
A.2.5~3.0L
B.1.5~2.5L
C.3.0~5.0L
D.2.5~3.5L
E.<2.5L
Bill and I are brothers. Mr Red is ______ father. [ ]
A. his
B. my
C. us
D. our