问题 判断题

平面布置图应包括平面图、立面图和剖面图。必要时,还要画出涂装车间在总图中的位置。( )

答案

参考答案:

实验题

(8分)已知2Al+Fe2O3  高温 2Fe+Al2O3被称为“铝热反应”。镁和氧化铜也能发生类似的反应,其化学方程式是      

某小组同学在实验室中进行镁和氧化铜反应的实验,充分反应后对于固体剩余物进行了实验探究。

【提出问题】固体剩余物是什么?

【猜想假设】假设① 铜和氧化镁;假设②       ;假设③       

【查阅资料一】大多数金属氧化物都能与盐酸反应生成金属氯化物和水(反应中元素化合价不发生改变)。

【实验探究】请完成下列实验。

实验操作实验现象实验结论
取少量固体剩余物于试管中,向其中加入足量的稀盐酸。(1)固体部分溶解,溶液为无色。假设①成立。
(2)          假设②成立。       
(3)          假设③成立。
【总结一】(1)对于有多种物质参加的化学反应,要推测充分反应后得到的剩余物的成分,需要考虑两个方面:一是      ;二是      

(2)一种金属单质可以和另一种金属氧化物反应。

【思考】是否任何一种金属单质都能与另一种金属氧化物反应?

【查阅资料二】该小组同学通过查阅资料,获得以下几组反应信息。

实验组别IIIIIIIVV
药 品AlFeAgAlCu
CuOCuOCuOFe2O3Fe2O3
相同条件下是否反应
【总结二】根据上表对比分析得出:金属单质与金属氧化物能发生反应,需满足的条件是   

阅读理解

阅读理解。

     While small may be beautiful,tall is just plain uncomfortable it seems,particularly when it comes

to staying in hotels and eating in restaurants.

     The Tall Persons Club Great Britain(TPCGB),which was formed six months ago to campaign

(发起运动)for the needs of the tall,has turned its attention to hotels and restaurants.Beds that are

too small,shower heads that are too low,and restaurant tables with hardly any legroom all make life

difficult for those of above average height,it says.

    But it is not just the extratall whose needs are not being met.The average height of the population

has been increasing yet the standard size of beds,doorways,and chairs has remained unchanged.

     "The bedding industry says a bed should be six inches larger than the person using it, so even a

kingsize bed at 6'66"(6 feet and 6 inches)is falling short for 25%of men,while the standard 6'3"?

bed caters for(满足需要)less than half of the male(男性)population,"said TPCGB president Phil

Heinricy,"Sevenfoot beds would work fine."

     Similarly, restaurant tables can cause no end of problems.Small tables,which mean the longlegged

have to sit a foot or so away from them,are enough to make tall customers go elsewhere.

    Some have already taken note,however.At Queens Moat Houses' Caledonian Hotel in Edinburgh,

6'6" beds are now put in as standard after requests for longer beds from taller visitors,particularly

Americans.

1.What is the purpose of the TPCGB campaign?

A.To provide better services.

B.To rebuild hotels and restaurants.

C.To draw public attention to the needs of the tall.

D.To attract more people to become its members.

2.Which of the following might be a bed of proper length according to Phil Heinricy?

A.7'2".      

B.7'.      

C.6'6".  

D.6'3".

3.What may happen to restaurants with small tables? 

A.They may lose some customers.

B.They may start businesses elsewhere.

C.They have to find easy chairs to match the tables.

D.They have to provide enough space for the longlegged.

4.What change has already been made in a hotel in Edinburgh?

A.Tall people pay more for larger beds.

B.6?6? beds have taken the place of 6'3" beds.

C.Special rooms are kept for Americans.

D.Guest rooms are standardized.