【多选题】已知某反应系统为 ,其微分方程可以描述为 ,初始条件为时间t为0时,C1的浓度为1,C2,C3为0。 已知k1,k2,k3分别为0.04,1,3。求时间为700时,C1,C2,C3的浓度分别为多少?
【单选题】Which one is NOT mentioned by the author as a reason that contributes to the prosperity of the travel industry?
A.
Some consumers are positioned to sell and seek bargains.
B.
The rising of middle and upper classes in Asia and their purhcase power.
C.
Technology injects new vitality into the industry and makes creativity possible.
D.
The participation andintermediary function of smart young travel retailers.
【多选题】已知某反应系统为 ,其微分方程可以描述为 ,初始条件为时间t为0时,C1的浓度为1,C2,C3为0。 已知k1,k2,k3分别为0.04,1,3。求时间为100时,C1,C2,C3的浓度分别为多少?
【多选题】已知某反应系统为 ,其微分方程可以描述为 ,初始条件为时间t为0时,C1的浓度为1,C2,C3为0。 已知k1,k2,k3分别为0.04,1,3。求时间为1000时,C1,C2,C3的浓度分别为多少?
【单选题】Choose the best answer to each of the following questions according to what is stated or implied in Text A. Which one is NOT mentioned by the author as a reason that contributes to the prosperity of t...
A.
Some consumers are positioned to sell and seek bargains.
B.
The rising of middle and upper classes in Asia and their purchase power.
C.
Technology injects new vitality into the industry and makes creativity possible.
D.
The participation and intermediary function of smart young travel retailers.
【多选题】已知某反应系统为 ,其微分方程可以描述为 ,初始条件为时间t为0时,C1的浓度为1,C2,C3为0。 已知k1,k2,k3分别为0.04,1,3。求时间为400时,C1,C2,C3的浓度分别为多少?
【单选题】Which one is NOT mentioned by the author as a reason that contributes to the prosperity of the travel industry?
A.
Some consumers are positioned to sell and seek bargains.
B.
The rising of middle and upper classes in Asia and their purchase power.
C.
Technology injects new vitality into the industry and makes creativity possible.
D.
The participation and intermediary function of smart young travel retailers.
【多选题】已知某反应系统为 ,其微分方程可以描述为 ,初始条件为时间t为0时,C1的浓度为1,C2,C3为0。 已知k1,k2,k3分别为0.04,1,3。求时间为500时,C1,C2,C3的浓度分别为多少?