问题 读图填空题

达尔文把通过激烈的生存斗争,适者生存,不适者被淘汰的自然现象称为                            

答案

自然选择

题目分析:达尔文认为,在生存斗争中,具有有利变异的个体,容易在生存斗争中获胜而生存下去.反之,具有不利变异的个体,则容易在生存斗争中失败而死亡.这就是说,凡是生存下来的生物都是适应环境的,而被淘汰的生物都是对环境不适应的,这就是适者生存.达尔文把在生存斗争中,适者生存、不适者被淘汰的过程叫做自然选择.其外因是环境的变化,内因是遗传变异.故答案为:自然选择

阅读理解

阅读理解。

     A poor traveler arrived at a small village. He had no food or money. He only had a cooking pot. He

made a small cooking fire, placed his pot on it, and poured in some water. When a few villagers asked

what he was doing, he said that he was making stone soup which was a recipe passed down from his

father. He then dropped (扔) a round stone into the pot.

     Then the traveler told the villagers stories of his travels and the exciting things he’d seen. He tasted

(品尝) his soup and said it was nice, but a bit of salt would be better. One villager went home and came

back with some salt for the soup.

     A few more villagers stopped to see what was going on when they heard the traveler speaking. The

traveler told more stories and said that some carrots or onions would be nice to the delicious soup. So

another villager said he could give a few carrots and brought them from his home.

     This continued with the traveler asking for onions, a bit of meat, celery (芹菜), potatoes to the soup.

     Finally, the soup was OK and everyone enjoyed the tasty meal.

1. What did the traveler have?

A. Some money.  

B. Some food.      

C. A cooking pot.  

D. Some salt.

2. What did the traveler put into the pot at first?

A. Some relish.    

B. Some vegetables.  

C. A stone.        

D. Some salt.

3. What did the traveler want to do when he said the soup was nice?

A. To let the villagers taste the soup.    

B. To have his meal.

C. To let people know his recipe.      

D. To get some salt for his soup.

4. Which of the following is NOT true according to the passage?

A. The traveler put tomatoes, potatoes and carrots into the soup.

B. The villagers were happy to taste the soup.

C. The traveler said the recipe was from his father.

D. The traveler got the soup and paid for nothing.

5. What can we learn from the passage?

A. The villagers were clever.      

B. The villagers didn’t like listening to stories.  

C. The traveler was slow.          

D. The traveler was very clever.

单项选择题