非竞争性抑制作用的动力学性质是()
A.Km增加而Vm降低
B.Km降低而Vmax增加
C.Km和Vmax均降低
D.Km和Vmax均增加
E.Km不变而Vm降低
参考答案:E
I have repaired much of the equipment. Would you please help me with _______within this week?
A.the other
B.the others
C.the rest
D.the remaining
錾子一般用T7A或T8A材料制成,在热处理时加热温度一般为()。
A、450℃~500℃;
B、500℃~600℃;
C、600℃~750℃;
D、750℃~780℃。