who are quizzed about their child"s physical activity level describe their children as fairly active.But a
new study of nearly 2,000 British school children suggests that many parents overestimate the amount
of physical activity their children are really getting.
The researchers equipped 1,892 British school children, ages 9 and 10, with accelerometers that
measure all physical activity during a given time period.The research, known as the Speedy study
collected the exercise data from children at 92 schools in Norfolk, England, between April and July
2007.
A child was regarded inactive if he or she recorded less than an hour a day of physical activity.
Although the majority of children studied were getting enough physical activity, a_sizable_minority_of_
children_were_not.Overall,39 percent of girls and 18 percent of boys studied were getting less than
an hour of physical activity each day.
But if you asked the parents of the inactive children to describe their child"s activity level, the vast
majority-80 percent-described their children as fairly or very physically active, according to the findings
published in the American Journal of Preventive Medicine.Interestingly, the children themselves had
more awareness about their lack of physical activity.Overall,40 percent of children overestimated their
physical activity.
But it wasn"t the parents of overweight children who were most likely to guess wrong about physical
activity levels.The parents who were most out of touch about their child"s physical fitness were more
likely to have children who were slim.Parents of girls were also more likely to overestimate physical
activity.The researchers noted that parents should be educated about the importance of physical activity
for children even if the child is not overweight.
"Parents of slim children appear to assume that their children are adequately active, " the study
authors reported."Increasing awareness regarding health benefits of physical activity beyond weight
control might help have a correct idea of physical activity levels and encourage behavior change."
B. Children with less than an hour a day of physical activity.
C. Overweight children.
D. Children out of touch with their parents for a long time.
B. Only a small number of children were not getting enough physical activity.
C. A small number of children didn"t overestimate their physical activity.
D. The minority of children were not studied at all.
B. persuade parents to keep an eye on their children"s weight
C. urge children to wear accelerometers during exercise
D. advise parents to keep in touch with their children
hearing memory has been greatly improved, he"ll be able to use and remember what he listens
to in class. The success of these suggestions depends upon your ability to use your child"s
natural desire to get involved in games he finds simple and fun.
A good way to begin is to read aloud a sentence from a book suitable for your child"s
reading age. Then ask your youngster to repeat the sentence back to you correctly. Next,
reread the sentence, leaving out a particular word. See if your child can identify the word
you left out. At the beginning use only simple sentences. Gradually, increase the length of the
sentences. Make sure you don"t rush things along too quickly, or your child may become
discouraged and tired of the game.
Take your child shopping with you often. He"s to remember a list of items you want to buy
in the supermarket. First , ask him to remember only a few things. Then, as he shows increased
ability to remember, make the list longer and longer. Praise him often and warmly when he
shows increased ability to remember things. He"ll become proud of his "good" memory and
will happily play the game.
Encourage your child to learn easy and short poems. As his ability to do this becomes
stronger, encourage him to remember longer poems. Do the same with songs.
B. you can stimulate(激发)your child"s interest in the activity
C. you force your child to get involved in more practice
D. you improve your own hearing memory first
B. to develop his reading skills
C. to help him remember what he hears
D. to play a simple game he may find fun
B. how you should take you child shopping with you
C. how to remember the items you want to buy
D. the way you help your child do shopping
and remember _____.
B. poems in the same way as he does with songs
C. the poems and songs which are similar in meaning
D. those songs that have the same meaning as poems
B. Parents.
C. Teachers.
D. Psychologists
The idea for a science experiment can come from an unusual place.After watching a YouTube
video of a dancing bird named Snowball, a scientist in California decided to study the ability of
animals to keep the beat.
Bird lovers have long claimed that their pets have rhythm, and there are many videos of dancing
birds online.Until now, scientists have suspected that humans are the only animals that can accurately
keep rhythm with music.
Thanks to Snowball, that_scientific_opinion is changing.Snowball is a cockatoo, a kind of parrot,
and his favorite song is "Everybody" by the Backstreet Boys.When he hears the song, he moves his
feet and rocks his body with the tempo, or pace of the music, as though he is the only bird member
of the boy band.
Aniruddh Patel is a neuroscientist, or a scientist who studies how the brain and the nervous system
contribute to learning, seeing and other mental abilities.He works at the Neurosciences Institute in San
Diego.After seeing Snowball" s dance online, Patel visited the cockatoo at the bird rescue facility he"s
called home for two years.The scientist played "Everybody" for Snowball and also played versions of
the song that were sped up or slowed down.Sometimes, Snowball danced too fast or too slowly.
Often, when there was a change in tempo, Snowball adjusted his dancing to match the rhythm.In other
experiments, scientists have observed the same abilities in preschool children.
Patel isn"t the only scientist who has studied Snowball"s moves.Adena Schachner, who studies
psychology at Harvard University, also wanted to know more about the dancing bird.Schachner"s
team played different musical pieces for Snowball and a parrot named Alex, as well as eight human
volunteers.The scientists observed that the birds and the humans kept time to the music with about
the same accuracy.
Schachner and her team watched thousands of YouTube videos of different animals moving to
music.Not all the animals could dance, however.From watching the videos, the scientists observed
that only animals that imitate sounds, including 14 parrot species and Asian elephants, accurately
moved in time to music.
B. humans are the only animals that can accurately keep rhythm with music
C. the brain and the nervous system contribute to some mental abilities
D. bird pets can have their special rhythm under human"s instruction
B. Snowball is able to adjust his dancing to match the rhythm.
C. Snowball cannot dance to the versions of the song Everybody.
D. it is the brain and the nervous system that control the mental abilities.
B. humans" musical sense
C. the same abilities in children
D. videos of dancing birds
you do, you must be in control of your time. Your success in high school depends on your use
of time. Here are some important things to remember.
* Begin each term by filling in a master plan. First fill in things you must do (classes, work,
practice, etc. That you can"t change). Then find the most effective use for these times.
* Set a regular time and place for study. This will save you time in the long run. If you have
a study hall in your school, use it!
* Use daylight hours to study whenever possible. For most people for every hour of study
done in daylight hours, it will take them one and a half hours to do the same task at night.
*Take breaks. Don"t plan marathon study time. Have a short rest before you study again.
*By using flash cards or summary sheets, you can use odd times to study-----while you"re
waiting for class to start or for a friend to pick you up.
* If possible, plan study time with a partner. Choose your partner wisely however. Make
sure you study, not socialize yourself.
* Do the most difficult tasks when you are active. (Take math for example: when you"re
energetic, it will become easier to solve; when you"re tired, it will be impossible ! )
*Make a daily checklist. Do the most important tasks first.
B. your hard work
C. your brain power
D. how well you play the game
B. most people can spare more time to study in the daytime
C. it"s more difficult to study effectively at night
D. we have more important things to do than study at night
B. keeping a good balance between study and rest
C. putting the most important tasks first
D. trying to study alone instead of working with others
B. irregular
C. busy
D. divided
B. college students
C. teachers
D. high school students
A flood happens when water pours over dry land.Floods can cause very big damage
when they happen unexpectedly.
Heavy rain can cause floods.If a lot of rain falls quickly,the earth is unable to soak (吸入)
it up,and the water builds up on the ground.When it runs off into the rivers,the rivers overflow
their banks.
The worst floods happen where the land is flat and low-lying.These areas are known
as floodplains.
What should I know if I live on a flood plain?
"Stay away from flood water."
Do not walk through moving water.It can knock you off your feet.If you must walk
through water,walk where the water is not moving.Use a stick to test the ground in front
of you."Stay away from power lines that are on the ground.You could be electrocuted (电死)."
If you are scared,share your fears with an adult.Floods can be scary,but remember-the
water ALWAYS goes away!
What should I do if a flood happens?
1.Get to the meeting spot with your family.
2.Try to get to higher ground.
3.If you can not leave,get to a higher area in your home.
4.Listen to your family and follow all instructions carefully.
What dangers does a flood lead to?
Floods can lead to electrocution from down power lines,angry dangerous animals coming
out,drowning from high water levels or flash floods,as well as many other things.
B.when it hardly ever rains
C.where the land is flat
D.where the land is low-lying
B.it may make you fall over
C.you may drink some dirty water
D.some fish can make you fall over
B.it is common for floods to happen
C.water can"t be stopped from flowing
D.you should pay close attention to floods
B.If a flood happens,you should get to the meeting spot with your family.
C.If a flood happens,you should not go to a higher ground immediately.
D.If a flood happens,it can lead to electrocution from down power lines
B.running away is a good way to save yourself
C.people are more likely to be attacked by animals
D.adults should try to persuade children to keep silent
actually bring results.For example, hunters may use a hunting charm (咒语). But they also use their
hunting skills and knowledge of animals. The charm may give hunters the extra confidence they need to
hunt even more successfully than they would without it.If they shoot a lot of game (猎物), they credit
the charm for their success. Many events happen naturally without magic. Crops grow without it, and
sick people get well without it.But if people use magic to bring a good harvest or to cure a patient, they
may believe the magic was responsible.
People also tend to forget magic"s failures and to be impressed by its surface successes. They may
consider magic successful if it appears to work only 10 per cent of the time. Even when magic fails,
people often explain the failure without doubting the power of the magic. They may say that the magician
made a mistake in reciting the spell or that another magician cast a more powerful spell against the
magician.
Many anthropologists (人类学家) believe that people have faith in magic because they feel a need to
believe in it. People may turn to magic to reduce their fear and uncertainty if they feel they have no
control over the outcome of a situation. For example, farmers use knowledge and skill when they plant
their fields. But they know that weather, insects, or diseases might ruin the crops. So farmers in some
societies may also plant a charm or perform a magic rite to ensure a good harvest.
B. a farmer
C. a magician
D. an anthropologist
B. Magic and Farming
C. Why Magic Works?
D. Why People Believe in Magic?
B. magic events
C. words or expressions
D. magicians
B. magic can turn dreams into reality
C. they are not sure of themselves
D. magic can bring good results
B. Believers in magic usually overstate the power of magic.
C. People use magic to reduce their uncertainty and give them extra confidence.
D. Magic can solve problems people can"t deal with in a natural way.
- 1根据装置图,回答有关问题:(1)请写出图中有标号仪器的名称:①______;②______;(2)请写出初中化学中用A和
- 2四个质点做直线运动,它们的速度图像分别如图所示,在2 s末能回到出发点的是( )A.①③B.②④C.①④D.②③
- 3There is no reason why you shouldn’t tell the headmaster ___
- 4阅读理解。 Most people think of racing when they see greyhoun
- 5I am always eager to do experiments, especially chemistry on
- 6函数y=(2+x)0-2+x的定义域是( )A.(-2,+∞)B.(-∞,-2]C.(-∞,-2)D.[-2,+∞)
- 7苹果树不宜在热带地区栽种,柑桔不宜在北方栽种,起制约作用的因素是温度。 [ ]
- 8抗日战争的胜利是中华民族自鸦片战争以来中国人民第一次取得反侵略战争的完全胜利,从此中国人民结束了帝国主义奴役中国人民的屈
- 9我国某个省,其西边以某大河为界,东边以某山地为界,北部与内蒙古相接。这个省的简称是A.黑B.冀C.晋D.陕
- 10星际火箭以0.8c的速率飞行,其静止质量为运动质量的多少倍?
- 1函数,的图象如图所示,下列结论:①两函数图象交点坐标为A(2,2);②当时,;③直线分别与两函数图象交于B、C两点,则线
- 2读“经纬线(全球范围)示意图”,阴影与非阴影部分分别为8日和7日,据此完成1~2题。1.甲地时间为 A.9时
- 3 _____________ the news of the accident in the coal mine, sh
- 4在巴黎和会上,法国总理克里孟梭对表现出不满的其他国家代表说道“法国是这次战争最大的受伤者,所以我们理所当然地应该拿更多的
- 5国家对农业进行社会主义改造的主要目的是[ ]A.合理使用耕地和先进的机械化农具B.调动广大农民的生产积极性C.发
- 6古诗阅读。次北固山下王湾客路青山外,行舟绿水前。潮平两岸阔,风正一帆悬。海日生残夜,江春入旧年。乡书何处达?归雁洛阳边。
- 7胎儿和母体交换物质的器官是[ ]A.脐带 B.羊水 C.胎盘 D.子宫
- 8已知f(x+1)=2x-2,那么f-1(2)的值是______.
- 9下列山脉属东北—西南走向的是( ) A.天山—阴山B.长白山—武夷山C.横断山脉D.祁连山
- 10巳知全集,是虚数单位,集合(整数集)和的关系韦恩(Venn)图如图所示,则阴影部分所示的集合的元素共有( )A.3个B