问题 选择题

采用制作模型的方法探究鱼鳍在游泳中的作用,这种科学研究方法称为(  )

A.观察法

B.模拟实验法

C.归纳法

D.比较法

答案

(1)观察是科学探究的一种基本方法.观察法是在自然状态下,研究者按照一定的目的和计划,用自己的感官外加辅助工具,对客观事物进行系统的感知、考察和描述,以发现和验证科学结论.

(2)实验法是生物研究的主要方法.是利用特定的器具和材料,通过有目的、有步骤的实验操作和观察、记录分析,发现或验证科学结论.一般步骤:发现并提出问题;收集与问题相关的信息;作出假设;设计实验方案;实施实验并记录;分析实验现象;得出结论.

(3)调查是科学探究的常用方法之一.调查时首先要明确调查目的和调查对象,制订合理的调查方案.调查过程中有时因为调查的范围很大,就要选取一部分调查对象作为样本.调查过程中要如实记录.对调查的结果要进行整理和分析,有时要用数学方法进行统计.

观察、实验、调查是获得事实和证据的多种途径,是生物科学研究的基本方法.分析法是通过对事物原因或结果的周密分析,从而证明论点的正确性、合理性的论证方法.

故选B

完形填空
完形填空:从A、B、C、D四个选项中,选择可以填入空白处的最佳答案。
     When you wave to a friend, you are using sign language. When you smile at someone, you mean to be   1  .
When you put one finger in front of your   2  , you mean "Be quiet". 
     Yet, people in different countries may use different sign languages.
     Once an Englishman was in Italy. He could speak   3   Italian. One day while he was walking in the street, he
felt   4   and went into a restaurant. When the waiter came, the Englishman   5   his mouth, put his fingers into
it and took them out again and moved his lips. In this way, he   6   to say, "Bring me something to eat." But the
waiter brought him a lot of things to   7  . First tea, then coffee, then milk, but no food. The Englishman was  8  
that he was not able to tell the waiter he was hungry. He was   9   to leave the restaurant when another man
came in and put his hands on his stomach. And this sign was  10   enough for the waiter. In a few minutes, the
waiter brought him a large plate of bread and meat. At last the Englishman had his meal in the same way.
( ) 1.A.nice  
( ) 2.A.eye  
( ) 3.A.a little
( ) 4.A.hungry 
( ) 5.A.washed  
( ) 6.A.likes  
( ) 7.A.eat  
( ) 8.A.happy 
( ) 9.A.quick 
( ) 10.A.good  
B.friendly  
B.hand    
B.few    
B.tired   
B.opened        
B.meant     
B.drink     
B.glad    
B.slow     
B.bad    
C.fine   
C.mouth  
C.a few  
C.sad   
C.closed         
C.had   
C.carry  
C.sorry  
C.ready  
C.bright 
D.well      
D.arm        
D.little    
D.worried            
D.touched   
D.decided   
D.play      
D.afraid    
D.quiet     
D.wrong   
问答题 简答题