试题与答案

商品房分摊的公用建筑面积包括哪两部分?

题型:问答题 简答题

题目:

商品房分摊的公用建筑面积包括哪两部分?

答案:

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下面是错误答案,用来干扰机器的。

参考答案:无差异曲线是用来表示两种商品的不同数量的组合给消费者所带来的效用完全相同的一条曲线.无差异曲线具有四个重要特征:第一,无差异曲线是一条向右下方倾斜的曲线,其斜率为负值.这就表明,在收入与价...

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题型:阅读理解
阅读理解。
Welcome to the zoo
     Come and meet the Indian (印度的) elephants and the new tigers from America. The bears are
waiting to meet you, and the monkeys from China are waiting to throw things at you. The lovely dogs
from Australia are waiting to laugh at you. The giraffes from Zambia are waiting to look down on.
TicketsOpening time
Adults:$2.00
Children:$1.00
Under 12: Free          
Friday,
10:00a.m----3:00p.m.  
The other days
9:00a.m----4:00p.m.             
Keep the zoo clean!
Do not touch, give food to or go near the animals.
根据短文内容完成选择。
1. How many kinds of animals are talked about in the passage?
A. Four        
B. Five
C. Six          
D. Seven
2. Now Mr. Smith is in the zoo with his two sons, one aged 14 and the other 10. How much are the
    tickets altogether (总共)?
A. $4.00      
B. $2.00    
C. $3.00      
D. $1.00
3. Which of the following is a visiting time?
A. 8:30 a.m. Monday.            
B. 9:30 a.m. Friday.
C. 5:00 p.m. Tuesday.            
D. 2:00 p.m. Sunday.
4. From the passage we can guess the animal "giraffe" must be very _____.
A. fat
B. long          
C. tall        
D. strong
5. Which of the following can we do in the zoo?
A. Take a few nice photos.
B. Give some food to the fish
C. Touch the monkey on the head.
D. Throw things everywhere.
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题型:实验题

乙醛在氧化铜催化剂存在的条件下,可以被空气氧化成乙酸。依据此原理设计实验制得并在试管C中收集到少量乙酸溶液(如图所示:试管A中装有40%的乙醛水溶液、氧化铜粉末;试管C中装有适量蒸馏水;烧杯B中装有某液体)。已知在60℃~80℃时用双连打气球鼓入空气即可发生乙醛的氧化反应,连续鼓入十几次反应基本完全。有关物质的沸点见下表

请回答下列问题:

(1)试管A内在60℃~80℃时发生的主要反应的化学方程式为(注明反应条件)____________________________________;

(2)如图所示在实验的不同阶段,需要调整温度计在试管A内的位置,在实验开始时温度计水银球的位置应在_____________;目的是____________________;当试管A内的主要反应完成后温度计水银球的位置应在___________________,目的是 _____________________________;

(3)烧杯B的作用是___________________________;烧杯B内盛装的液体可以是____________(写出一种即可,在题给物质中找);

(4)若想检验试管C中是否含有产物乙酸,请你在所提供的药品中进行选择,设计一个简便的实验方案。所提供的药品有:pH试纸、红色的石蕊试纸、白色的醋酸铅试纸、碳酸氢钠粉末。实验仪器任选。该方案为____________________________________

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