问题 实验题

回顾“观察蚯蚓”的实验,回答下列问题。

⑴如何辨认蚯蚓身体的前端?                                             

⑵用手触摸蚯蚓身体,感觉体表     。[请选择:A.有粘液    B.干爽光滑]

⑶在实验的过程中,应保持蚯蚓体表        ,因为蚯蚓是靠      呼吸的。根据蚯蚓的这个特点,解释大雨过后为什么蚯蚓会纷纷爬到地面上?                    

⑷根据对蚯蚓运动的观察,蚯蚓运动是由肌肉和        配合使身体蠕动完成的。

答案

故答案为:(1)靠近环带的一端是蚯蚓的前端;(2)A;(3)湿润;湿润的体壁;大雨过后,水淹,雨水把土壤缝隙中的氧气排挤出来,土壤中的氧气减少,蚯蚓在土壤中无法呼吸,为了呼吸蚯蚓纷纷钻出地.(4)刚毛。

题目分析:(1)、靠近环带的一端是蚯蚓的前端,颜色较浅且光滑,看上去像一个粗大的指环。

(2)用手触摸蚯蚓身体,感觉体表有粘液。

(3)蚯蚓是用湿润的体壁进行呼吸的,因此在观察蚯蚓时,要用湿棉絮轻擦蚯蚓体表.蚯蚓是用湿润的体壁进行呼吸的,呼吸的是空气中的氧气.大雨过后,水淹,雨水把土壤缝隙中的氧气排挤出来,土壤中的氧气减少,蚯蚓在土壤中无法呼吸,为了呼吸蚯蚓纷纷钻出地。

(4)根据对蚯蚓运动的观察,蚯蚓运动是由肌肉和刚毛配合使身体蠕动完成的.

阅读理解

阅读理解 阅读下面短文,从每题A、B、C、D 四个选项中,选出一个能回答所提问题或完成所给句子的最佳答案。

The City Mouse and the Country Mouse

Once there were two mice. They were friends. One mouse lived in the country; the other mouse lived in the city. After many years the Country mouse saw the City mouse; he said, "Do come and see me at my house in the country." So the City mouse went. The City mouse said, "This food is not good, and your house is not good. Why do you live in a hole in the field? You should come and live in the city. You would live in a nice house made of stone. You would have nice food to eat. You must come and see me at my house in the city."

The Country mouse went to the house of the City mouse. It was a very good house. Nice food was set ready for them to eat. But just as they began to eat they heard a great noise. The City mouse cried, "Run! Run! The cat is coming!" They ran away quickly and hid.

After some time they came out. When they came out, the Country mouse said, "I do not like living in the city. I like living in my hole in the field. For it is nicer to be poor and happy, than to be rich and afraid."

小题1: The story is about ____________.

A.two mice

B.two cities

C.two countries

D.A mouse and a cat小题2:The City mouse lives in ____________.

A.a hole

B.a house made of wood

C.a house made of stone

D.the field小题3:The great noise came from ____________.

A.the cat

B.the Country mouse

C.the City mouse

D.the house小题4: The mice were caught by the cat, weren’t they?

A.Yes, they were.

B.No, they weren’t.

C.They ran away and hid.

D.We don’t know.小题5: Which of the following is True?

A.The two mice lived together.

B.The two mice had a great meal.

C.The Country mouse had a poor life while the City mouse had a happy life.

D.The Country mouse had a poorer but happier life than the City mouse.

单项选择题