决定酶催化反应类型的是
A．酶的活性中心
B．活性中心外的必需基团
C．辅酶或辅基
D．酶蛋白
参考答案：C
封守（秦律）
_____ to his experiment in the lab, the idea for the new plan came to his mind. [ ]
A. While devoting
B. While devoting himself
C. While he was devoted
D. While devoted
