在跆拳道比赛中受伤，只允许在（）分钟以内的治疗。
A.2
B.1
C.3
参考答案：B
This is the factory _______we visited last year. [ ]
A. where
B. which
C. the one
D. at which
成年男性血红蛋白正常参考值范围为（）
A.100～110g/L
B.140～170g/L
C.110～150g/L
D.170～200g/L
E.120～160g/L
