题干

   A lot of people say math is not their strong suit. One New Jersey parent wants to help change that. Laura Overdeck grew up with numbers. She always helped measure ingredients(食材)when her mother baked,and she learned about angles from her father. She went on to major in astrophysics(天体物理学)in college. Overdeck wanted her own children to be good at math,too.“And when our first child was about two,we just started giving her a math problem every night,”Overdeck said. The problem was usually a story,involving animals,cars or candies that let the kid count.“Our third child started,at age two,yelling that he wanted his own math problem because he saw his brother and sister doing it. And we thought,‘Wow,we have a household where math is the popular thing at bedtime,’”Overdeck said.

In February,Overdeck set up Bedtime Math,an Internet website where she posts daily puzzles for children. Overdeck is particularly keen to hook(吸引)children on numbers before they go to school. So why introduce little ones to math so early?

Sian Beilock,an expert on performance anxiety,says the more fun and familiar math is early on,the less likely children will feel nervous when they start to learn math in school.“My lab has shown recently that kids as early as first grade report feeling anxious about doing math,”Beilock said.

“You can hear totally educated adults say,‘You know I’m just not that good at math.’or‘I’m kind of afraid of math.’And that’s a totally acceptable thing for a well-educated person to say,but you never hear them say,‘Well,you know,I’m just not that good at reading.’,”Overdeck said. She wants children and their parents to become as fluent in numbers as they are in Harry Potter.

【小题1】Overdeck majored in astrophysics because she.
A.was really fond of mathematics
B.hoped to change math education in the US
C.had an interest in physics
D.would like her children to be good at math
【小题2】What can be inferred from Paragraph 2?
A.Stories can be used to encourage kids in solving math problems.
B.Math will become more popular in every household.
C.Math is enjoyable in Overdeck’s family.
D.The third child is cleverer than his brother and sister.
【小题3】Beilock’s attitude towards Overdeck’s idea is.
A.agreeableB.puzzled
C.anxiousD.critical
【小题4】The unfavorable situation of the US in math ability is shown by.
A.the popularity of Bedtime Math
B.children’s performance anxiety in school
C.people’s reaction to math
D.adults’ great fondness for Harry Potter
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同类题2

   Government intelligence agencies have a plan to build computers that store information inside DNA and other organic molecules(分子).

Intelligence Advanced Research Projects Activity(IARPA)announced plans to develop tabletop-sized machines that can store and retrieve(取回)data from large batches of polymers — a term that refers to a wide variety of long,string-like molecules. Polymers can store data in individual atoms or groups of atoms.

The project is an attempt to solve a basic problem of the modern era:the vast and growing costs of data storage. Datacenters around the world sucked up 416. 2 terawatt hours of electricity in 2016. That's about 3 percent of the global supply,and it accounts for 2 percent of global greenhouse gas emissions.

A 2016 paper found that DNA,in particular,could store computer information more densely,require less energy,and survive higher and lower temperatures than conventional hard drives. The authors of that paper reported on the successes of prototype(雏形)DNA computers that used the genetic molecules for both long-term storage and random access memory(RAM).

But no one has yet figured out how to handle DNA data storage on large scales.

IARPA officials said the new effort, called Molecular Information Storage, will be broken up into three periods:a two-year program to figure out how to store data in DNA or other molecules at high speed,a two-year program to figure out how to retrieve that data at high speed, and a two-year effort to develop an operating system that can run on that DNA.

Many of the technologies IARPA wants to develop are untested at these scales, so it's unclear how far away that proposed tabletop device really is.

【小题1】What would be the best title for the text?
A.Store Data on DNA Computers
B.Develop Computers of Future
C.Polymers Used to Store Data
D.Information Stored in DNA
【小题2】Which of the following best explains“sucked up”underlined in Paragraph 3?
A.Consumed.B.Stored.
C.Delivered.D.Produced.
【小题3】What can Molecular Information Storage do compared to traditional hard drives?
A.Produce and save less energy.
B.Store more information faster.
C.Be better for the environment.
D.Control temperatures more easily.
【小题4】Where can you find the course of the test about Molecular Information Storage?
A.In Paragraph 3.B.In Paragraph 4.
C.In Paragraph6.D.In Paragraph 7.

同类题4

   With the development of modern science and technology,the functions of cellphones have changed greatly.【小题1】 The only difference may be that they fit in your pocket and you pay by the minute to use them.Some of the things a cellphone can do for you will be available this year:

Surf at speed

Cellphones that let you use the Web have been around for years.So,what’s new? Well,faster thirdgeneration (3G) networks that let you surf at anywhere.【小题2】 Possible choices are from IJG Electronics VX 8000 and Motorola V1150.Listen as you go.

【小题3】 There is no doubt that it is about to change.Sony Ericsson’s new W8001 can hold around 150 songs in its 500 MB memory.And Samsung’s SPHV5400 even comes with a 1.5GB hard drive.Mobile phones may eventually replace mini MP3 players,especially for teens.

Camera cellphones are not new either but most of them have limitations: around 1­megapixel (百万像素).However new technology has made 2­megapixel units more common,and 3­megapixel units are showing up soon.Some 2­megapixel models,like Sony Ericsson’s K7501,offer limited zoom and focus controls.【小题4】 Portable TV.

You say you like “watching TV”? That’s what Samsung MMA700 wants to give you.The new model lets users watch popular TV programmes for a fee.Other choices are Nokia’s 6620, Sanyo’s MM740 and NEC’s N940.【小题5】

The above are just a handful of what you’ll see in the coming months.Further down the road,your mobile phone may play a host of other roles,such as mobile credit card,position locator and so on.So what is there that a cellphone can’t do?

A.The NEC model lets you watch public TV—no fee.
B.Without a cellphone,you can do nothing in your daily life.
C.Nowadays,new cellphones are much cheaper than old ones.
D.Today’s doitall mobiles have a lot in common with the computer.
E.This then allows a carrier to send video,music,and games to your phone.
F.Others,like LG’s recent A7110,can even capture 30 minutes of fullmotion video.
G.The problem with most cellphone MP3 players is that they hold only a handful of songs.

同类题5

   Most people love to lose themselves in a great book, maybe a classic novel, a modern storybook or a great work of history. But many people also live busy lives, and for them finding time to sit quietly and read is difficult, if not impossible. Fortunately, with the coming of the Internet and high-tech tools like the iPod, more and more people are making literature a part of their lives again.

A very special website now makes it possible for people to listen to books that they simply would not have time to read. The site is called Audible Inc., and it’s the best place to download audio (音频的) books. Over the past few years, hundreds of thousands of these books have been recorded. They include nearly every classic, as well as most newly-published ones. Most of these are read by voice actors who really bring the text to life.

Audible Inc. lets you easily and quickly download a book and load it onto your iPod or other MP3 players, or onto CDs so that you can listen in your car. The site is like Amazon, com, but for audio books. It includes thousands of recommendations (推荐) and customer reviews that are extremely helpful. The site lets you listen to a free piece of each book so you can tell ahead what the narrator (讲述者) sounds like. No wonder that most people who listen to an audio book for the first time are immediately attracted.

This is the perfect opportunity to find out what so many people know about audio books. But be careful — you may become attracted to audio books for life.

【小题1】Who might be most interested in Audible Inc.?
A.People who have iPods.B.People who travel a lot.
C.Teenagers who love writing.D.Book lovers with little free time.
【小题2】What does Audible Inc. offer people?
A.Free books.B.Books to listen to.
C.Books about history.D.Traditional paper books.
【小题3】Why is a free piece of each book given on Audible Inc.?
A.To let people experience the narrative style ahead.
B.To introduce different styles of modern books.
C.To provide a chance to learn to narrate stories.
D.To meet the customers’ requirements.
【小题4】What can we know from the last paragraph?
A.The author shows the benefits of audio books.
B.The author advises people to choose audio books.
C.The author stresses the great attraction of audio books.
D.The author warns people against addiction to reading.