问题 选择题

某些金属外观为银白色,同学们认为它可能和铁一样,有磁性。有同学提出“我们可以先拿磁铁来吸一下”。就“拿磁铁来吸一下”这个过程而言,属于科学探究中的( )

A.假设

B.实验

C.观察

D.做出结论

答案

答案:B

考点:

专题:课本知识同类信息.

分析:科学探究的主要环节有提出问题、猜想与假设、制定计划与设计实验、进行实验与收集证据、分析与论证、评估、交流与合作,据此结合题意进行分析判断.

解答:解:根据题意,“可拿磁铁吸一下”是一个具体的操作实验过程,在假设、实验、观察、做出结论等基本环节中应属实验的环节.

故选B.

点评:本题难度不大,考查的是科学探究方法,是研究初中化学问题的重要方法,掌握科学探究的基本环节是正确解答本题的关键.

阅读理解

In an American classroom, a Chinese girl was asked to answer a question. She stood up and smiled, without making any sound. The American teacher looked at himself and didn’t see anything funny. So he asked her the question again. The girl just smiled but said nothing. The teacher was angry. He didn’t know that the girl smiled to cover her embarrassment(尴尬)because she wasn’t able to answer the question.

In a dining room in Beijing, an Englishman was careless and dropped a plate. The Chinese who had seen this began to laugh. The Englishman felt uncomfortable and even got angry. “They are laughing at me,” he thought. In fact the Chinese laughed not at the Englishman or his bad luck—whether he is a foreigner or a Chinese. The smile or laughter has several feelings: don’t take it so seriously; laugh it off, it’s nothing; such things can happen to any of us.

小题1:The Chinese girl smiled in an American classroom because ________________.

A.she was asked to answer a question

B.she was asked to stand up

C.she couldn’t answer the question

D.the teacher looked funny小题2:Which feeling is NOT included in the laughter when the Englishman dropped a plate?

A.Don’t take it seriously.

B.Bad luck!

C.It’s nothing.

D.It can happen to any of us.小题3:What does the writer want to tell us?

A.Smile and laughter don’t mean the same thing to different people.

B.Smile and laughter always bring happiness.

C.American people are easy to get angry.

D.Chinese students are impolite

填空题