在2A+B==3C+4D反应中，表示该反应速率最快的是
A．υ(A)="0.5" mol/(L·s) B．υ(B)="0.3" mol/(L·s)
C．υ(C)="0.8" mol/(L·s) D．υ(D)="1" mol/(L·s)
相关试题
Progress______ so far very good and we are sure that the work will be finished on time.
| A．was | B．had been | C．has been | D．will be |
Charles was alone at home, with_______ looking after him.
| A．someone | B．anyone | C．not one | D．no one |
It is often ______ that human beings are naturally equipped to speak.
| A．said | B．to say | C．saying | D．being said |
I can’t leave. She told me that I ______ stay here until she comes back.
| A．can | B．must | C．will | D．may |
—— ______ , as a matter of fact
粤公网安备 44130202000953号