关于同工酶的叙述中错误的是
A．分子结构相同B．催化的反应相同C．理化性质不同D．生物学性质不同
参考答案：A
— I rang the bell for a long time last night, but no one opened the door.
— Oh, the family __________ a party and they didn’t hear the bell.
A．had
B．were having
C．had had
D．have had
按引起烧伤的原因分类，下列哪项是错误的（）
A.热力烧伤
B.物理烧伤
C.化学烧伤
D.电烧伤
E.放射烧伤
