问题 选择题

调查是科学探究常用的方法之一.下列说法正确的有(  )

①在调查过程中应选定调查范围;

②调查范围偶尔飞过的鸟或昆虫可以不做记录;

③为了确定生物种类,小强爬到树上将鸟巢摘下来;

④调查到的生物数量不是这种生物在这个环境中的全部数量;

⑤进行调查时,有时要用数学方法对结果进行统计.

A.①②③

B.②③④

C.①④⑤

D.③④⑤

答案

调查法的步骤:一、明确调查问题,确定调查范围及对象;二、选择调查方式 不同的调查课题应采用不同的调查方式.调查法包括抽样调查和全面调查,选择普查还是抽样调查要根据所要考查的对象的特征灵活选用,一般来说,对于具有破坏性的调查、无法进行普查、普查的意义或价值不大时,应选择抽样调查,对于精确度要求高的调查,事关重大的调查往往选用普查.三、制定调查提纲及项目.四、实施调查.五、调查材料及数据的处理.六、撰写调查报告.①在调查过程中应选定调查范围,符合调查法 的要求; ④调查到的生物数量不是这种生物在这个环境中的全部数量,因为这种生物在这个环境中的全部数量过多,应选择抽样调查;进行调查时,有时要用数学方法对结果进行统计;调查范围内所有生物都要做好记录,小强爬到树上将鸟巢摘下来,破坏了鸟类的生存环境,做法错误;故选C

阅读理解

阅读理解。

 

     Welcome to your favorite show-"Music Land "! This month we are going to have some special

shows on Bach, the Father of Music.

     Johann Sebastian Bach was born in Germany (德国) in 1685, During his life, Bach wrote a lot of

music for the church (教堂) and for his students, but he himself did not keep his own works (作品)

carefully.  Luckily, his second wife (妻子) saved them for him, so today we can still remember Bach

through his music.

     Bach married twice in his life and had 20 children. He loved his family very much. He wrote music

for one of his daughters to tell her that too much coffee was bad for her health. I am now going to play

a song for you from this interesting Coffee Cantata. And we will hear more about Bach after this song.

1. Where was Bach born?        

A. Germany.              

B. America.         

C. Japan.                 

D. France.

2. Why is Bach's second wife important to his music?         

A. She helped Bach keep his works.         

B. Many of Bach's works were for her.         

C. She gave Bach a lot of good ideas about music.         

D. Her money helped Bach write music.

3. Why did Bach write the Coffee Cantata ?        

A. To celebrate his birthday.         

B. To show people his love of coffee.         

C. To tell his child not to drink so much coffee.        

D. To make a new kind of music for the church.

4. This passage may be a ____.        

A. fashion show          

B. radio show         

C. TV play                

D. talk show

5. What  is this  passage mainly (主要地) about?        

A. Ways to learn Bach's music.          

B. The Bach family's history.          

C. Bach's great church music.          

D. Stories about Bach and his music.

单项选择题