_____is waiting for at the gate. He wants to say thanks to you.

A. Somebody B. Anybody C. Everybody D. Nobody

練習(xí)冊系列答案
相關(guān)習(xí)題

科目：初中英語 來源：2015年北京市海淀區(qū)中考二模英語試卷（解析版） 題型：閱讀理解

All the time you spent memorizing multiplication tables（乘法表）may have made you a better mathematician, according to a new study． A team of scientists from Stanford University, in California, have shown how the brain reorganizes itself as kids learn math．

After a certain amount of time spent practicing math, kids can put away the calculator（計算器）． They don’t even need to count on their fingers． They simply know the answers to subtraction(?), addition (+), and multiplication (×) facts． The quicker kids can recall basic math facts, the easier it is for them to solve more difficult math problems．

The Stanford University researchers observed（觀察）the brain activity of 28 students, ages 7 to 9, for the study． They took scans of the students’ brains as the students solved math calculations without the help of a calculator, pen or paper． A calculation—three plus four equals seven, for example—flashed on a screen． The students pushed a button to say if the answer was right or wrong． The scientists also recorded the response speed, and what parts of the brain became active as the kids pushed the button．

These observations showed a process called fact retrieval． Rather than using their fingers to count, or scrawling out equations（列算式）on a piece of paper, the students pulled the answers from memory． It’s as if the answers to basic subtraction, addition, and multiplication problems are kept in a long-term storage part in the brain． The storage part was built from repetition． “Experience really does matter,” said Dr． Kathy Mann Koepeke of the National Institutes of Health．

Children make the changefrom counting to fact retrieval when they are 8 to 9 years old, the study says． This is the time when most students are learning basic addition and subtraction． When kids have basic math facts memorized, the brain has more free space to learn more difficult math．

This process has benefits for the future． The study showed, as kids got older, their answers relied more on memory and became quicker and more correct． Less brain activity was involved in counting． Some children make this change quicker than others．

Scientists hope to use this research to develop new strategies（策略）to help kids learn math at all levels． One strategy the study suggests is for students to test themselves in different orders—solving five times three before five times two, for example． Mixing up the order keeps the brain active． Keep these trainings up, and you may be a math whiz in no time．

1.In the study, kids put away calculators because they can ______．

A．use calculators well

B．scrawl out equations

C．recalling basic math facts

D．count on their fingers

2.The process of “fact retrieval”in Paragraph 4probably means ______．

A．picking out results by working together with their partners

B．finding out answers based on practicing carefully and patiently

C．trying out ways of dealing with problems by attending training

D．working out problems according to what they have remembered

3.What can we know from the study?

A．Kids need to practice using calculators to keep their brains active．

B．Math learners should change to counting practice at the age of 8 to 9．

C．Training by mixing up the order of multiplication tables can help learn math better．

D．Less brain activity may be involved in solving difficult problems when kids get older．

4.What is the best title of the passage?

A．Math from Memory

B．Strategy Development

C．Brain Reorganization

D．Training by Repetition

查看答案和解析>>

科目：初中英語 來源：2016屆天津紅橋區(qū)九年級下學(xué)期第二次模擬考英語試卷（解析版） 題型：單項填空

—Where is Tianjin?

— It is ____ the east of China. It’s my home town.

A. on B. beyond C. in D. at

查看答案和解析>>

科目：初中英語 來源：2016屆遼寧丹東第十七中學(xué)九年級第一次模擬考英語試卷（解析版） 題型：單項填空

----By the time I was five, I_________English.

----Really?

A. had started learning B. have started learning

C. started to learn D. started learning

查看答案和解析>>

科目：初中英語 來源：2016屆遼寧丹東第十七中學(xué)九年級第一次模擬考英語試卷（解析版） 題型：單項填空

The box is_____heavy____I can’t carry it.

A. so; that B. such; that

C. such a ; that D. so a ; that

查看答案和解析>>

科目：初中英語 來源：2016屆遼寧丹東第十七中學(xué)九年級第一次模擬考英語試卷（解析版） 題型：單項填空

---Do you know_____ about China?

----The people and the food

A. if Jim likes B. how does Jim like

C. what Jim likes D. why does Jim like

查看答案和解析>>

科目：初中英語 來源：2016屆遼寧丹東第七中學(xué)九年級第二次模擬考英語試卷（解析版） 題型：其他題

根據(jù)短文內(nèi)容，填寫表格。（所填內(nèi)容可能是單詞，短語或句子）

There are many kinds of vegetables. Do you know some of them? Do you like eating them? It is good for our health to eat some every day. Let’s see what vegetables help what parts of our body!

A slice of carrot looks like human eyes. And the science now shows carrots greatly help the blood go to the eyes. Often eating them is good for our eyes.

A tomato has four parts and is red. The heart has four parts and is red, too. All of the research shows tomatoes are really the best food for the blood and the heart.

Celery looks more like bones. It specifically makes bones strong. Bones are 23% Ca. If you don’t have enough Ca in your diet, the bones will be weak.

Onions look like the body’s cells. Today’s research shows onions help take away waste things from all of the body cells.

You see, how important vegetables are! Maybe some of them don’t taste good. But if you want to be healthy, you should eat as many as you can. You should have a balanced diet!

Eating1.___________is good for our health

Names of the vegetables

Functions(作用) of vegetables

Carrots

to help the blood2.__________

3.______

to be the best food for the blood and the heart

Celery

to 4._________

Onions

to help5.____from all of the body cells

查看答案和解析>>

科目：初中英語 來源：2016屆遼寧丹東第七中學(xué)九年級第二次模擬考英語試卷（解析版） 題型：單項填空

The Changjiang River is one of the ________ rivers in the world.

A. shortest B. longer C.longest D. shorter

查看答案和解析>>

科目：初中英語 來源：2015-2016學(xué)年黑龍江大慶第五十一中學(xué)七年級下期中英語試卷（解析版） 題型：單詞拼寫

根據(jù)提示完成句子

1.從現(xiàn)在開始，我們應(yīng)該努力學(xué)習(xí)

We should study hard ___________ _____________ _______________

2.我們期盼著打開這個盒子

We are looking __________ ___________ _______________ the box..

3.他很認(rèn)真，就像我一樣

He is so careful, __________ ___________ me

4.不但他們，就連瑪麗都去游泳了。

Not only they, but also Mary ____________ ____________.

查看答案和解析>>

同步練習(xí)冊答案