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问题 选择题
下列反应最终无沉淀产生的是(   )

A．过量的CO2通入Na2SiO3溶液中

B．向AlCl3溶液中滴加稀氨水至过量

C．少量的CO2通入BaCl2溶液中

D．向MgCl2溶液中滴加NaOH溶液至过量

答案

答案：C

阅读理解
阅读理解。
人的喜好不同，发展方向也就不同。来看一看下列人物各自的喜好和志向吧。
I'm rally good at selling things. I also love helping people. But I'm not so good at solving
(解决) problems. I think I'd like to be a salesman or a detective (侦探).

I really like doing things with my hands. I also enjoy working with wood. I don't enjoy
working in the same place every day, and I hate being in noisy places. I think I'd like to be
a factory worker or a carpenter (木匠).

I'm good at explaining things and I really like children. I can't stand working long hours. I
think I'd like to be a doctor or a teacher.

I'm really interested in meeting people, and I enjoy wearing different clothes every day.
I'm not so good at organizing(安排) my time and computers. I am going to be a model or
an accountant(会计).

I enjoy helping people, but I can't stand working nights and weekends. I want to be a nurse or a social worker.

根据上述内容，选择正确的答案.。
1. Larry wants to be         . 
A. a worker or a teacher        
B. a nurse or a doctor  
C. a salesman or a detective    
D. a model or a carpenter  
2. Anita doesn't enjoy working in         . 
A. the same place      
B. different places  
C. noisy places        
D. A and C
3.          wants to be a teacher or a doctor. 
A. Anita    
B. Jill    
C. Maria    
D. Jim
4. Maria likes          . 
A. meeting people      
B. wearing different clothes
C. A and B            
D. working nights and weekends
5. What does "can't stand" mean in Chinese? 
A. 不能忍受  
B. 不能站立  
C. 不能坚持    
D. 不能适应
查看答案
多选题

下表中，除去物质所含杂质的方法正确的是（　　）

 物质所含杂质除去杂质的方法
AN2气体O2将气体缓缓通过灼热的铜网
BCuO粉末C加入过量稀盐酸，充分反应
CNaCl溶液NaOH加入过量的稀盐酸
DKCl溶液CuCl2加入氢氧化钠溶液至不再产生沉淀

A．A

B．B

C．C

D．D
查看答案