【单选题】由基元步骤构成的复杂反应 :2A → 2B+C A+C → 2D ,以 C 物质的浓度变化表示反应速率的速率方程 ( 已知: -dC A /dt=K A1 C A 2 -K A2 C B 2 C c +K A3 C A C C ) 则
A.
dC c /dt=K A1 C A 2 -K A2 C B 2 C c +K A3 C A C C
B.
dC c /dt=1/2K A1 C A 2 -1/2K A2 C B 2 C c +1/2K A3 C A C C
C.
dC c /dt=2K A1 C A 2 -2K A2 C B 2 C c +2K A3 C A C C
D.
dC D /dt=-K A3 C A C C
【多选题】沥青烟气净化方法主要有 [填空(1)] [填空(2)] [填空(3)] [填空(4)]
【单选题】What is Skimming?
A.
Examine an area carefully by quickly, often because you are looking for a particular person or thing.
B.
Reading through a passage quickly to get the general idea.
【单选题】在攒拳怒目增气力动作中,向两侧冲拳时,拳眼( )