Stop! Listen! What do you hear? You may hear many different sounds. Some of those sounds may be noisy.  Noise is loud or unwanted sound.

     Noise can be caused by many kinds of machines, such as motorcycles, jet planes, tractors and so on. And, to some people, rock bands (搖滾樂隊) are also noise.

     What happens to people who live near noisy machines or use them over a period of time? Doctors find that these people have trouble in sleeping. But, most important, constant  (不斷的) loud noise can cause a loss of hearing.

     Scientists use a unit (單位) of measure called a decibel  (分貝)  to measure the loudness of a sound. The sound of a quiet room, for example, measures 35 decibels. Talking measures between 40 to 65 decibels. Sounds from traffic and from some rock bands can measure over 120 decibels. Noise at this high level causes the greatest hearing loss.

     49.  From the passage, we know noise is _______.

          A. wanted sound                 B. loud or unwanted sound

          C. all sounds that you can hear      D. comfortable sound

     50. A "decibel" is a _______.

          A. unit that measures sound

          B. kind of noise

          C. machine that makes very loud noise

          D. person who hates noise

     51.  According to the passage, loud noise can_______.

          A. help people sleep better       B. stop machines

          C. cause a loss of hearing        D. kill people

練習(xí)冊系列答案
相關(guān)習(xí)題

科目：初中英語 來源： 題型：閱讀理解

You don’t need to speak French to understand the Parisians. You just need to know how to make gestures. A new guide has come out by French tourism officials, which is to help foreign visitors understand Parisians with a list of commonly used gestures like “shut up”. “If you use them the next time when you’re in Paris, people will start mistaking you for a native (當(dāng)?shù)厝? in no time,” says the online guide at www.cestsoparis.com.
Some of the city’s rude native people in Paris have been a headache for the tourism authorities(旅游當(dāng)局) for a long time. They have tried their best to ask Parisians to be more friendly to foreign visitors. They have decided to show visitors commonly used gestures by Parisians at www.cestsoparis.com. Visitors can learn and get help from there.
The website includes the common gestures such as “Bof” and “Camembert”. “Bof” is used to mean “I don’t know” or “I disagree”, and “Camembert” is to tell someone to shut up.
And it also includes a note, which warns visitors not to use the gestures too freely.Otherwise, they may see some even ruder Parisian expressions.
(   )16. The coming out of that new guide in France is　　　 .
A. to help foreign visitors to learn French well
B. to help foreign visitors understand Parisians
C. to make a suitable website in Paris
D. to tell people the importance of speaking French
(   )17. The gesture “Camembert” in the website means　　　 .
A. I don’t know         B. I disagree
C. Don’t speak          D. Don’t stop speaking
(   )18. The underlined word “They” refers to(指代)　　　 .
A. the rude native people in Paris    B. the tourism authorities in Paris
C. the commonly used gestures     D. the foreign visitors in Paris
(   )19. Which of the following is NOT true according to the passage?
A. Some native Parisians are rude to foreign visitors.
B. The new guide is mainly for foreign tourists.
C. You’ll be regarded as a native if you use the gestures at www.cestsoparis.com.
D. You can use the gestures in Paris as freely as you want.
(   )20. The BEST title for this passage is　　　 .
A. How to learn French          B. What places to visit in Paris
C. Gestures make you a Parisian   D. How rude Parisians are

查看答案和解析>>

科目：初中英語 來源： 題型：閱讀理解

When you are curious about something and want to know more about it, you can use the way of asking questions. Asking questions is the first step to make discoveries and find interesting answers. The following steps can guide you during the research.
Step 1 Write down the subject that you are interested in on a piece of paper. Just get the main idea down. For example, you might write:
Discover more about robots.
Step 2 Stop and think for a moment about what you have already known about your subject. List what you have already known like the sentences below:
1. The first robot appeared in the USA in 1959.
2. A robot can do housework and act as a teacher.
3. Sometimes a robot catches viruses and causes a lot of problems.
Step 3 What can you do with what you want to learn? By asking questions, start writing down questions about the robots on the paper:
1. What might robots be like in the future?
2. What other things can robots do for people?
3. What kind of power will robots possibly use in five years?
Step 4 Armed with your list of questions, you can now go to the nearest library or computer to begin your research. As you learn more about your subject, you'll probably discover some new questions.
For example, you might discover that robots can help scientists explore dangerous places, like the sea and outer space. How? What happened? Asking new questions can help you research your subject more widely.
The next time you find something interesting to research, take time to organize your thinking by asking good questions. And remember that learning more always brings more questions.
【小題1】What does the writer advise us to do when we’re curious about something?
A．To read more books about it. B．To look it up in the dictionary.
C．To turn to the teacher for help.D．To raise questions and find the answers.
【小題2】What does the underlined part “Armed with your list of questions” mean?
A．Writing down your list of questions.B．Discussing your questions with others.
C．Taking your list of questions with you. D．Putting your list of questions under your arm.
【小題3】What might be the correct order of the steps when you do research?
① List what you want to learn.        ② Find new problems.
③ List what you’ve already known.    ④ Choose a research subject.
A．④③①②B．④①③②C．②③④①D．③②①④
【小題4】 What might be the best title for this passage?
A．Doing Research onRobots B．Asking Good Questions While Doing Research
C．Having Interesting Answers on RobotsD．Finding Subjects before Doing Research

查看答案和解析>>

科目：初中英語 來源：2012年初中畢業(yè)升學(xué)考試（山東泰安卷）英語（帶解析） 題型：閱讀理解

閱讀下面的短文，并根據(jù)文章后的要求答題。（請注意問題后的詞數(shù)要求）
Do you get angry when your friends sing loudly while you are trying to work or when your best friend does not wait for you after school?
If you do, you need to take control of your feelings. Getting angry with others can cause you to lose friends.
Gary Egeberg, an American high school teacher, has written My Feelings Are Like Wild Animals to help you control your feelings. It tells how to stay cool when bad things happen.
The book says that getting angry only makes problems worse. It can never make them better.
“Getting angry is not a natural way to act,” the book says. It is just a bad habit, like smoking.
The book says you can control your anger easily … all you have to do is to tell yourself not to be angry.
The book gives many tips to help you if you get angry easily. Here are the top three.
●Keep a record. Every time you get angry, write down why you are angry. Look at it later and
you will see you get angry too easily.
●Ask your friends to stop talking to you when you get angry. This will teach you not to be angry.
●Do something different. When you get angry, walk away from the problem and go somewhere
else. Try to laugh.
【小題1】What is this article mainly about? ( no more than 10 words )
_________________________________________________________________
【小題2】What will happen to you if you get angry with others? ( no more than 5 words )
_________________________________________________________________
【小題3】Is getting angry a natural way to act? ( no more than 5 words )
_________________________________________________________________
【小題4】List two tips the book gives on how to control your anger. ( no more than 12 words )
(1) _______________________________
(2) _______________________________
【小題5】Translate the underlined sentence into Chinese.（將文中劃線句子翻譯成漢語。）
_________________________________________________________________

查看答案和解析>>

科目：初中英語 來源：2013-2014學(xué)年江蘇省揚州市江都區(qū)九年級第一學(xué)期期末英語試卷（解析版） 題型：閱讀理解

A recent survey of 2000 parents in Britain showed that they are often afraid of science questions asked by their curious children only because they have no idea what the answer is. Here is a list of some simple questions that you can ask your parents to see if they know the answers.

    Q: Why is the sky blue?

    A: You probably know white sunlight is made up of seven colors. While it moves in a straight line when going through space, it starts to divide as it hits “raised area” in the atmosphere. The ones with longest wavelengths pass through easily. The blue , however , can be taken in by the gas molecules (分子) because it has a shorter wavelength , which in turn scatters (使分散) it in different directions. That’s why when you look up at the sky, it appears to be blue.

    Q:Why does the moon sometimes appear during the daytime?

    A: The simple answer to that is because just like any other object it is being lit by the sun. As long as it is around 45 degrees or even 90 degrees off the sun, it will receive light and be able to be seen. The only time it is not able to be seen during its 28-day orbit (軌道) around the earth is when it is right between the earth and the sun. That’s because its back , which is not lit by the sun, is facing us.

    Q: Where do birds/ honeybees go in winter?

    A: While the bird part is quite easy, since a lot of them get together and travel, the honeybee part is likely to puzzle your parents. It turns out that these busy insects stop being that active when the temperature drops below 50°F. Instead ,they get together in the lower central area of the hive （蜂巢）and form a ball around their queen. This helps keep both warm enough to survive the cold winter months.

1.The sky looks blue mainly because the color blue in the sunlight_______.

A. has the longest wavelength among all the colors

B. cannot be taken in by the gas molecules

C. doesn’t hit “raised area” in the atmosphere

D. cannot pass through space successfully

2.How long can’t the moon be seen during the daytime in a month?

A. 2                             B. 28                           C.30                                      D. 31

3.What do honeybees choose to do when the temperature drops below 50°F?

A. They choose to be active in the wild.

B. They choose to keep themselves warm.

C. They choose to travel to a warm place.

D. They choose to get together in the upper central area of the hive.

4.What is NOT explained in the passage?

A. Why is the sky blue?

B. Why is the moon able to be seen during the daytime?

C. Why do birds travel in winter?

D. Where do honeybees go in winter?

 

查看答案和解析>>

科目：初中英語 來源：2010年海南省�？谑谐跞蠈W(xué)期期中檢測英語卷 題型：閱讀理解

There are some easy things you can do to protect the environment and the earth. Choose ideas from the list or come up with a few of your own.

·Plant flowers, grass or trees.

·Whenever you visit a park or beach, take away what you bring there—keep rubbish in a bag until you can put it in a dustbin.

·Turn off the lights and TV sets when you leave the room. This can save a lot of electricity.

·Turn off the tap when you brush your teeth. You can save some water by not letting it run. Also, use a glass cup instead of a paper cup because this saves paper.

·Keep the doors and windows closed in winter to keep warm air in.

·Give your old books and magazines to a library instead of throwing them away.

·Give your old clothes to poor children you know instead of throwing them away.

·Use both sides of paper.

·Stop pouring dirty water into the rivers or lakes nearby.

·Encourage all your friends to do the same things you do to help protect the earth. You don’t have to wait until Earth Day to do these things. Make every day Earth Day. If everyone makes a contribution to protecting the environment, the world will become much more beautiful.

1.From the above, we know that this is           .

A. a sign                     B. a proposal (倡議書)       C. an ad(advertisement)

2.The writer tells us           .

A. that we can’t do all these things until Earth Day

B. to pour dirty water into the rivers

C. to save water by not letting it run while brushing our teeth

3. We can            to save paper.

A. use a paper cup            B. use both sides of paper       C. give new books to a library

4.Which of the following is wrong according to the writer?

A. Turn off the lights when you leave the room.

B. Close the doors and windows in winter.

C. Use a paper cup when you brush your teeth.

5. What’s the best title of the passage?

A. Protect the Earth                  B. Save Money      C. Make Better Use of Old Things

 

查看答案和解析>>

同步練習(xí)冊答案