Do you like Physics or Chemistry? Matter (物质) is always changing, either physically or chemically. If a material goes through a physical change, it is still the same material. During a chemical change, one kind of matter changes into another completely different kind of matter. For example, when we burn wood or cook fish, materials change. People use chemistry every day in the kitchen. The food we eat has many different natural chemicals. Many of the chemicals in food are necessary parts of a healthy diet.
Much of the food we eat has been changed in some way from its original form. The changes that food undergoes may be chemical or physical. If a change does not affect the food’s chemical composition, we call it a physical change. For example, melted (溶解的) cheese has gone through a physical change. It gets softer when it is heated but it is still the same type of material. Any change that changes the chemicals in the food is a chemical change. Bread contains carbohydrates, which are chemicals made up of carbon, hydrogen, and oxygen. When bread is baked (烘焙), the carbohydrates break down into black carbon and water. The carbon gives the bread a dark color and a crunchy texture (质地). The water goes into the air.
To get a closer look at the chemistry of baking, let’s watch how a carrot cake is made. The main steps of baking any cake are mixing the ingredients (材料) and baking them together. In the course of making cakes, the dry ingredients are mixed first. They are flour, sugar, salt, baking soda, baking powder and spices. Flour gives the cake structure. Sugar helps to make it sweet. Salt strengthens the cake batter. Baking powder and baking soda make the cake rise.
Next, the carrots may be added to the cake. These help give the carrot cake its flavor, texture, and color. The other ingredients in the carrot cake are oil and eggs. The oil makes the cake tender and moist. Eggs serve two purposes—the whites help the cake to rise, while the yolks (蛋黄) give it a creamy texture. All of these ingredients form a mixture. This mixture can be separated into its different components (成分) although it is very difficult. Once the cake mixture is formed, it’s poured into a cake pan and baked in an oven. The heat from the oven has caused chemical changes to take place. The cake is finished and the ingredients cannot be separated.
1.The material doesn’t change when we _______.
A.melt ice cream B.burn paper C.bake apple pies D.cook beef
2.What’s the correct order of baking a carrot cake in the passage?
a. Carrots, oil and eggs are added. b. The dry ingredients are mixed.
c. The mixture is baked in an oven. d. Baking powder and soda make the cake rise.
e. Preparing some dry ingredients. f. The heat from the oven causes chemical changes.
g. The ingredients cannot be separated. h. The mixture is poured into a pan
A.b-a-h-f-g B.b-h-c-d-f C.e-d-c-a-g D.e-c-a-g-d
3.After reading the passage, we know that ________.
A.water and carbon can give the cake a dark color and a crunchy texture
B.people can separate the mixture of eggs and oil into different components
C.chemicals in different kinds of food that people eat are bad for their health
D.sugar and salt can’t be put into the mixture to make a cake at the same time
4.The passage mainly helps us to _______.
A.look at the steps of baking cakes closely
B.learn how to make carrot cakes at home
C.have a healthy diet with natural chemicals
D.understand physical and chemical changes
九年级英语阅读单选中等难度题
—Tom, which subject is much________for you, physics or chemistry? —Chemistry, I think.
A.attractive B.more attractive C.most attractive D.the most attractive
九年级英语单选题中等难度题查看答案及解析
How do you feel about your looks? Is it important to have a beautiful face? Are there other things that can make a person special? The way you look is special. Do you know what I mean by that? We all look a little different. Some of us are tall. Some of us are fat. The point is, all of us have our own look-our own face.
Sometimes, we might feel bad about looking different. We might feel like we look ugly or strange. But our differences are what make us special.
I recently watched a speech by a man named Robert Hoge. He was born with a strange-looking face. His mother always worried that he would face many difficulties in life. But what Hoge did changed his mother's mind little by little. Strangers would stare at him or even make fun of him. But he didn't care at all. He decided to accept his face and feel confident (自信的) in himself. He has made a decision to live an amazing life.
It's hard when you feel like you don't look "normal" or "perfect". But the truth is, no one is perfect. The important thing to remember is that you are special, no matter what you look like.
根据短文内容,判断下列各句正(T)、误(F)。
1.According to the writer, all of us look a little different. _____
2.The writer recently watched a speech by Robert Hoge's mother. _____
3.Hoge's mother used to worry that he would face many difficulties in life. _____
4.When strangers made fun of him, Hoge lost his confidence. _____
5.The writer tries to tell us that we are special no matter what we look like. _____
九年级英语阅读判断中等难度题查看答案及解析
----Which subject do you like better, math or physics?
---- I prefer _______ math ________ physics.
A. to learn , to learn B. learning , to learning
C. learn , than learn D. to learn , than learn
九年级英语单项填空中等难度题查看答案及解析
Do you like Physics or Chemistry? Matter (物质) is always changing, either physically or chemically. If a material goes through a physical change, it is still the same material. During a chemical change, one kind of matter changes into another completely different kind of matter. For example, when we burn wood or cook fish, materials change. People use chemistry every day in the kitchen. The food we eat has many different natural chemicals. Many of the chemicals in food are necessary parts of a healthy diet.
Much of the food we eat has been changed in some way from its original form. The changes that food undergoes may be chemical or physical. If a change does not affect the food’s chemical composition, we call it a physical change. For example, melted (溶解的) cheese has gone through a physical change. It gets softer when it is heated but it is still the same type of material. Any change that changes the chemicals in the food is a chemical change. Bread contains carbohydrates, which are chemicals made up of carbon, hydrogen, and oxygen. When bread is baked (烘焙), the carbohydrates break down into black carbon and water. The carbon gives the bread a dark color and a crunchy texture (质地). The water goes into the air.
To get a closer look at the chemistry of baking, let’s watch how a carrot cake is made. The main steps of baking any cake are mixing the ingredients (材料) and baking them together. In the course of making cakes, the dry ingredients are mixed first. They are flour, sugar, salt, baking soda, baking powder and spices. Flour gives the cake structure. Sugar helps to make it sweet. Salt strengthens the cake batter. Baking powder and baking soda make the cake rise.
Next, the carrots may be added to the cake. These help give the carrot cake its flavor, texture, and color. The other ingredients in the carrot cake are oil and eggs. The oil makes the cake tender and moist. Eggs serve two purposes—the whites help the cake to rise, while the yolks (蛋黄) give it a creamy texture. All of these ingredients form a mixture. This mixture can be separated into its different components (成分) although it is very difficult. Once the cake mixture is formed, it’s poured into a cake pan and baked in an oven. The heat from the oven has caused chemical changes to take place. The cake is finished and the ingredients cannot be separated.
1.The material doesn’t change when we _______.
A.melt ice cream B.burn paper C.bake apple pies D.cook beef
2.What’s the correct order of baking a carrot cake in the passage?
a. Carrots, oil and eggs are added. b. The dry ingredients are mixed.
c. The mixture is baked in an oven. d. Baking powder and soda make the cake rise.
e. Preparing some dry ingredients. f. The heat from the oven causes chemical changes.
g. The ingredients cannot be separated. h. The mixture is poured into a pan
A.b-a-h-f-g B.b-h-c-d-f C.e-d-c-a-g D.e-c-a-g-d
3.After reading the passage, we know that ________.
A.water and carbon can give the cake a dark color and a crunchy texture
B.people can separate the mixture of eggs and oil into different components
C.chemicals in different kinds of food that people eat are bad for their health
D.sugar and salt can’t be put into the mixture to make a cake at the same time
4.The passage mainly helps us to _______.
A.look at the steps of baking cakes closely
B.learn how to make carrot cakes at home
C.have a healthy diet with natural chemicals
D.understand physical and chemical changes
九年级英语阅读单选中等难度题查看答案及解析
Which subject do you like______, English, maths or physics?
A. good B. well C. better D. best
九年级英语单项填空中等难度题查看答案及解析
----What do you think of the film acted by Jackie Chan?
----Oh, I don’t like it at all. It is very________.
A. interesting B. boring C. exciting D. amazing
九年级英语单项填空困难题查看答案及解析
--- Do you know Jackie Chan?
--- Yes, he is ________ great actor. I really like his movies.
A.a B.an C.the D.\
九年级英语单项填空中等难度题查看答案及解析
--What is our physics teacher like, do you know?
--Oh, he is very kind _________ he looks very serious.
A. because B. though
C. if D. when
九年级英语单项填空中等难度题查看答案及解析
If you always put off doing things you should do or would like to do, you have experienced procrastination(拖延症).
Do you have procrastination because you are lazy? In fact, lazy people don’t do anything and are just fine with it. Procrastinators, however, want to do something but can’t force(促成) themselves to start.
There’s a goal in your brain, for example, what are the tasks to be completed today? What goals need to be achieved this year? Everything is in control.
But at the same time, your brain will also have a love of freedom, know how to enjoy yourself. Whenever you secretly make up your mind to complete a task, this “you” will give you a list of temptations. And you will fall step by step.
So if you are a procrastinator, perhaps you spend lots of time watching TV, playing video games, checking WeChat, eating, cleaning or walking back and forth through the room. Afterwards, you feel powerless and have the feeling of guilt(内疚) and trouble.
We all have procrastination more or less. __________ For example, it took Da Vinci(达·芬奇) sixteen years to complete the smile of Mona Lisa. In the middle of the delay(拖延), he went to study and changed his idea of light and shadow.
Excellent people also need to procrastinate, so that inspiration(灵感) has more time in their heads to collide(冲突) with each other. So procrastination is not always terrible. What’s terrible is that we don’t know why we procrastinate. The best way to deal with procrastination is to really understand your heart and find out the reason why it’s not easy for you to start. Some people procrastinate to think, while others procrastinate to escape(逃避).
Do you have the habit of procrastination in your daily life? What is the reason?
1.If you are a procrastinator, you might spend much time doing many activities EXСЕРТ __________.
A.checking WeChat B.doing the task now C.walking around the room D.playing video games
2.The underlined word temptation in Paragraph 4 means “__________” in Chinese.
A.打击 B.快乐 C.诱惑 D.计划
3.Which of the following sentences can be put in the __________?
A.However, you are more procrastinating than those successful people.
B.Procrastination is always a good thing to everyone.
C.There are many ways to deal with procrastination.
D.Excellent people may be more procrastinating than you.
4.The writer thinks __________.
A.sometimes people need to procrastinate B.procrastinators don’t want to do meaningful tasks
C.people have procrastination because they are lazy D.procrastination always gets in the way of success
九年级英语阅读单选中等难度题查看答案及解析
No matter ______ the weather is like, you can always find surfers out _____ the waves in Hawaii.
A.what; riding B.how; riding
C.what; to ride D.how; to ride
九年级英语单项填空中等难度题查看答案及解析