题目内容
B
Most American kids love Halloween treats, but a bucket of Halloween candy can be a dentist’s nightmare. Some parents try to get rid of half of the candy after their children go to bed, but dentists say parents also need to separate the good kinds of treats from the bad.
It is not exactly what a child eats that truly matters, but how much time it stays in his mouth. According to pediatric dentist Dr. Kaneta Lott, the most damaging stuff is something that is sticky or very hard and thus stays in the mouth for a long time. This is because we all have bacteria in our mouths. When we eat, the bacteria take our food as their food and produce an acid that destroys the surface of the teeth, causing cavities to form. The longer the food stays in the mouth, the more likely cavities will develop. Therefore, potato chips are worse than candy because they get stuck between teeth. For the same reason, raisins and crackers are not the best choice. Hard candies take a long time to consume and are also a bad choice for Halloween treats
If children really love candy, dentists recommend that they eat chocolate instead. Unlike hard candies, chocolate dissolves quickly in the mouth. Besides, chocolate contains tannins, which help to kill some of the bacteria in the mouth. But no matter what a child eats, brushing after each meal is still the best way to fight cavities.
55．What is the main purpose of this passage?
A. To discuss how cavities can be treated.
B. To point out the problems with Halloween celebrations.
C. To tell parents what sweets are less damaging to their children’s teeth.
D. To teach parents the meaning of Halloween candies for their children.
56．Why are hard candies especially bad for teeth?
A. They may break the child’s teeth.
B. They contain too much sugar.
C. They help bacteria to produce tannins.
D. They stay in the mouth for a long time.
57．According to the passage, which of the following is a better choice for Halloween treats?
A. Chocolate. B. Crackers. C. raisins. D. Potato chips.
58．According to the passage, which of the following is true of tannins?
A. They are produced when the bacteria digest the food.
B. They help to get rid of some bacteria in the mouth.
C. They help chocolate to dissolve more quickly.
D. They destroy the surface of the teeth.
【小题1】C
【小题2】D
【小题3】A
【小题4】B
解析
天天向上一本好卷系列答案
小学生10分钟应用题系列答案This dictionary tells you about English words and how to use them in reading, writing and speaking English. It not only gives the meaning of words, it can also help you with spelling, word-building, grammar and pronunciation.
To use your dictionary correctly, you need to understand how the dictionary works. At the front of the book, you will find some exercises to help you make the most use of your dictionary.
If you look up the word “colour”, you will find two spellings for this word. “Colour” is used in British English, while “color” is used in American English. When there are differences between British and American spelling, the dictionary shows it with the word “BrE” for British English and “AmE” for American English.
The dictionary also helps you pronounce words correctly. We use a special alphabet (特殊字母) to show pronunciation. If you turn to the inside back face, you will see all the phonetic letters (音标) with some words to show you how they are pronounced. Just look at the inside back cover when you’re not sure how to say a word.
The most important reason for using a dictionary is to find out the meaning of a word—its definition
In this dictionary, the definitions have been written using only 2000 words. This means that the definitions of even the most difficult words are simply explained and easy to understand.
When a word has more than one meaning, read all the meanings until you find the one that correctly tells the use of the word you are looking for.
Most of the words in this dictionary can be used by people in all parts of the world.
【小题1】The AmE spelling of the Chinese word “颜色” in this dictionary is ________.
| A．colour | B．colar | C．color | D．corner |
| A．understand | B．write | C．say | D．know |
| A．词性 | B．词条 | C．词义 | D．词库 |
| A．some of the difficult words |
| B．all the words in the dictionary in a simple way |
| C．all easy words |
| D．the words with two meanings |
This dictionary tells you about English words and how to use them in reading, writing and speaking English. It not only gives the meaning of words, it can also help you with spelling, word building, grammar and pronunciation.
To use your dictionary correctly, you will find two spellings for this word. “Colour” is used in British English, while “color” is used in American English. When there are differences between British and American spelling, the dictionary shows it with the word “BrE” for British English and “AmE” for American English.
The dictionary also helps you pronounce words correctly. If you turn to the inside back face, you will see all the phonetic letters (音标 ) with some words to show you how they are pronounced. Just look at the inside back cover when you're not sure how to say a word.
The most important reason for using a dictionary is to find out the meaning of a word — its definition.
In this dictionary, the definitions have been written using only 2, 000 words. This means that the definitions of even the most difficult words are simple and easy to understand.
1.________ of the words in the dictionary have two spellings.
|
A．All |
B．Some |
C．Few |
D．One |
2.What is the main reason for us to use a dictionary？
|
A．To read the word correctly. |
|
B．To write the word out. |
|
C．To know the meaning of the word. |
|
D．To find the difference between British English and American English. |
3.The phonetic letters helps you ________ each word correctly.
|
A．say |
B．write |
C．understand |
D．know |
4.The Chinese meaning of “definition” here is________.
|
A．词性 |
B．词条 |
C．词义 |
D．词库 |
5.How many words are there in this dictionary?
|
A．Two thousand. |
B．One thousand. |
C．One hundred. |
D．We don't know. |