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【单选题】
采用间歇反应釜来生产乙酸乙酯,反应方程式如下:a+b→c+d。a,b,c,d分别代表了乙醇,乙酸,乙酸乙酯和水,反应等温等,其为可逆反应。反应速率方程为:-r=k(Ca*Cb-Cc*Cd/Kc)。其中k为2.2*10^-6m3/(kmol.s),Kc为2.93。反应初始溶液的组成为,乙醇3.91 kmol/m3;乙酸10.2 kmol/m3;乙酸乙酯为0;水17.56 kmol/m3,乙酸乙酯分子量为88。若乙醇的转化率为0.35,反应器的日生产能力为50000kg/天,非生产操作时间为5小时。那么反应器的有效体积应当为多少立方米?
A.
279.0695
B.
261.7701
C.
296.3689
D.
313.6683
E.
244.4707
F.
227.1713
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【简答题】Judge the types of sentence structure: One way to develop self-confidence is to do the thing you fear and to get a record of successful experiences behind you.
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A.
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【单选题】One way to develop a good work ethic is to identify someone you believe personifies a good work ethic, observe their behavior, and then emulate it.
A.
embodies
B.
imitates
C.
forges
D.
represents
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【简答题】One logical way to develop a paragraph is to arrange details in time order. In other words, details are presented in the ______ in which they happen. If details are arranged in an orderly fashion, rea...
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【判断题】Competition is fierce! One way to respond quickly to customer needs is to develop a strategy of empowering employees.
A.
正确
B.
错误
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【单选题】洋地黄类药物的常见心血管系统毒性反应为各种心律失常，其中最常见的是
A.
窦性心动过缓
B.
三度房室传导阻滞
C.
长期房颤者心律变得规则
D.
室性期前收缩(室早)二联律
E.
室上性心动过速伴房室传导阻滞
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【单选题】洋地黄类药物的常见心血管系统毒性反应为各种心律失常，其中最常见的是
A.
窦性心动过缓
B.
室上性心动过速伴房室传导阻滞
C.
Ⅲ度房室传导阻滞
D.
长期房颤者心律变得规则
E.
室性期前收缩多呈二联律、三联律
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【判断题】国际贸易中根据机动幅度内的商品品质差异,可以对价格进行调整。比如,大豆水分每 增加 1%,价格就降低1%。
A.
正确
B.
错误
查看完整题目与答案
【单选题】One way for the region to use water efficiently is to ______.
A.
develop other enterprises that cost less water
B.
draw a plan of irrigation for the various nations
C.
import water from water-rich nations
D.
stop wars of any sort for good end all
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【单选题】One way for the region to use water efficiently is to ______.
A.
develop other enterprises that cost less water
B.
draw a plan of irrigation for the various nations
C.
import water from water-rich nations
D.
stop wars of any sort for good and all
查看完整题目与答案
相关题目：
【简答题】Judge the types of sentence structure: One way to develop self-confidence is to do the thing you fear and to get a record of successful experiences behind you.
查看完整题目与答案
【判断题】在国际贸易中,可以根据机动幅度内的商品品质差异,对价格进行调整。例如,大豆水分每+-1%,价格可以-+1%。
A.
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B.
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【单选题】One way to develop a good work ethic is to identify someone you believe personifies a good work ethic, observe their behavior, and then emulate it.
A.
embodies
B.
imitates
C.
forges
D.
represents
查看完整题目与答案
【简答题】One logical way to develop a paragraph is to arrange details in time order. In other words, details are presented in the ______ in which they happen. If details are arranged in an orderly fashion, rea...
查看完整题目与答案
【判断题】Competition is fierce! One way to respond quickly to customer needs is to develop a strategy of empowering employees.
A.
正确
B.
错误
查看完整题目与答案
【单选题】洋地黄类药物的常见心血管系统毒性反应为各种心律失常，其中最常见的是
A.
窦性心动过缓
B.
三度房室传导阻滞
C.
长期房颤者心律变得规则
D.
室性期前收缩(室早)二联律
E.
室上性心动过速伴房室传导阻滞
查看完整题目与答案
【单选题】洋地黄类药物的常见心血管系统毒性反应为各种心律失常，其中最常见的是
A.
窦性心动过缓
B.
室上性心动过速伴房室传导阻滞
C.
Ⅲ度房室传导阻滞
D.
长期房颤者心律变得规则
E.
室性期前收缩多呈二联律、三联律
查看完整题目与答案
【判断题】国际贸易中根据机动幅度内的商品品质差异,可以对价格进行调整。比如,大豆水分每 增加 1%,价格就降低1%。
A.
正确
B.
错误
查看完整题目与答案
【单选题】One way for the region to use water efficiently is to ______.
A.
develop other enterprises that cost less water
B.
draw a plan of irrigation for the various nations
C.
import water from water-rich nations
D.
stop wars of any sort for good end all
查看完整题目与答案
【单选题】One way for the region to use water efficiently is to ______.
A.
develop other enterprises that cost less water
B.
draw a plan of irrigation for the various nations
C.
import water from water-rich nations
D.
stop wars of any sort for good and all
查看完整题目与答案
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