问题 实验题

小明为了探究“液体内部压强有何特点”,就自制了学具.如图他分别将2个塑料“可口可乐”饮料瓶的底部和侧壁上开一个圆孔,用胶水将一块橡皮膜粘贴在圆孔上,并将水倒入瓶内,观察到2个瓶子的橡皮膜都向外凸.

(1)甲图说明了液体对       有压强.

(2)乙图说明了液体对       有压强.

答案

(1)容器底;(2)容器壁.

题目分析:液体对容器底和侧壁都有压强,液体内部向各个方向都有压强;故该题重点观察两图中那个液面的橡皮膜发生了变化,进而结合液体内部压强的特点分析即可判断.

解:(1)分析甲图可看出,此时下端的橡皮膜向下突出,即说明了液体对容器底有压强;

(2)分析乙图可看出,此时右端的橡皮膜向右突出,即说明了液体对容器壁有压强;

故答案为:(1)容器底;(2)容器壁.

点评:液体内部压强的规律是我们必须熟知的内容,本题中主要是将规律与现象进行对应,针对现象得出结论.

完形填空

Six years ago, my interest in football started when I watched the 2006 World Cup.   小题1:  In fact, football has influenced me in many ways and I have benefited ( 受益 ) a lot from it.

First, 小题2:  Through talking about football, I have known many people with the same interest as mine. We often exchange opinions with each other in our spare time and have fun.

Second,    小题3:   For instance, I am a football fan of AC  Milan. My passion for Milan has stimulated(刺激) me to learn Italian by myself because I wanted to learn morn about that special Italian club. And most football games I have watched are aired in English, so I have the chance to practice my English listening comprehension and to learn more English words about sports.

Third, 小题4: I remember Bai Yansong once says in his book that playing a football match is just like going through an act of life. I quite agree with him. In a football match, at first you are perhaps in a leading position,  but if you don't keep working hard enough, your opponents may take advantage of your carelessness to win the match. Also in a football match, even you are left behind by a score of, say, 0--3 and you have limited match time left, you still have a chance and hope to win as long as you play really hard. I think it is the same in our real life.

In a word,   小题5:  I will go on living football and supporting my Milan.

A.Football has been an excitement for me to learn more knowledge, especially foreign languages.

B.Being a football fan gives me a lot of chances to make friends because common interest brings us together.

C.Since then, I have always been crazy for football

D.Football has influenced me much in a positive way.E. Football has provided me with a deeper understanding of life.

多项选择题