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问题 选择题

如下图所示装置中，胶头滴管中吸入甲液体，平底烧瓶中充入(或放入)乙物质，挤压胶头滴管，一段时间后装置中的气球明显胀大。则甲乙两种物质可能是  

[     ]

甲乙
A.稀硫酸铜片
B.双氧水MnO2
C.稀盐酸锌粉
D.NaOH 溶液CO2
答案

答案：D

改错题

短文改错（共10小题；每小题1分，满分10分）

I often dream of a teacher. I dream of standing on the platform in the classroom and give lessons to lovely boys and girls. I teach them, play with them, but watch them growing up. I am always

young when I was staying with them. I know there is not easy to be a teacher. You have to learn in

order to teach. Without enough knowledges, you can never learn well. What is more, you have to

be friends with your pupils and take good care of him. Only by this way can you be a good teacher

and win respect from them. Though I am a student now, I will work as very hard to make my

dream come true.
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单项选择题

中小企业信用档案库是由（）建立的。

A.商业银行

B.中小企业管理部门

C.信用调查机构

D.人民银行
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