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【简答题】
比较下列化合物的酸性强弱
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皮皮学刷刷变学霸
举一反三
【简答题】宋代建筑方面的理论著作之一有李诫的《 》，这是北宋官方颁布的一部建筑设计、施工的规范书籍
【简答题】660K时的反应 2 NO + O2 2NO2。NO和O2的初始浓度和及反应的初始速率v的实验数据为:实验编号 1 0.10 0.10 0.0302 0.10 0.20 0.0603 0.20 0.20 0.240试求(1)反应级数和速率方程;(2)速率常数k;(3)当= c(O2) =0.15mol·L-1时的反应速率。(10分)
【单选题】How long before we land?
A.
We will be coming around with a snack soon.
B.
We will be landing in about 20 minutes.
C.
Yes, it's a very long flight, isn't it?
【单选题】-Hi， Tom.Have you ordered yet？ -________. [ ]
A.
No, I don’t like it
B.
Yes, I’m being served
C.
I have no idea
D.
I make myself at home
【简答题】We had a long discussion before we reached an agreement．
【单选题】_____ exciting news! We’ve never had ____ long vacation before.
A.
What; such a
B.
What an, such a
C.
How; so
D.
What ; so a
【单选题】听力原文：Hi, Serra. This is Vicky from purchasing. The bookcase you ordered for your office is no longer in stock. I can place a special order for you but it will take at least 4 weeks for it to be delive...
A.
To discuss a problem with the order
B.
To confirm a delivery item
C.
To request a catalogue
D.
To request an order for office supplies
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