There is little we can do about it, ______
A:is there B:can’t we C:isn’t there D:can we
I can't imagine he has done it, ______
A:can't I B:can I C:has he D:hasn't he
How (can) you do such (thing) (without) (permission)
A:can B:thing C:without D:permission
There is little we can do about it, ______
A:is there B:can't we C:isn't there D:can we
According to the passage, "I can shut my eyes" means ______.
A:I can close my eyes B:I can't see it C:I can't notice it D:I can stand it
It can be concluded from the passage that ______.
A:the value of a college degree has decreased now B:new college graduates today can't find jobs C:a college degree can still lead to a good job D:graduates must prepare early to find jobs
My sister can't cook______.
A:my brother can't too B:either can my brother C:neither can my brother D:nor my brother can
?
?下面有3篇短文，每篇短文后有5道题，每道题后面有4个选项。请根据文章的内容，从每题所给的4个选项中选择1个最佳答案。
{{B}}第一篇{{/B}}
{{B}}? ? ? ? ? ? ?
? ? ? ? ? Eta Carinae{{/B}}
? ?As possibly
the galaxy’s (银河) most massive star, Eta Carinae is now engaging in some very
unusual behaviour. Australian astronomers, being in the Southern Hemisphere
(半球), are able to observe it clearly.
? ?In the 19th century, Eta
Carinae was for a time the third brightest star in the sky. It has now become
less bright so that binoculars (双筒望远镜) are needed to see it. "It seems to be
brightening and becoming less bright over a period of many years", said Dr Bob
Duncan from the Australia Telescope National Facility.
? ?While it
is not unusual for stars to vary in brightness, the period is usually much
shorter. "Since 1992 it has become four times brighter, and then last year it
began to drop dramatically," he said.
? ?The problem in observing
Eta Carinae is that it has been surrounded by a cloud of gas and dust, making it
hard to see the star directly. However, radio waves and infrared light (红外线) can
pass through this cloud, so telescopes that receive these wavelengths can
observe what is occurring.
? ?Eta Carinae is of particular interest
to astronomers because it seems to be in its death throes (剧痛). Being so large
it will end up as a supernova (超新星). There has not been a supernova in our
galaxy since the invention of the telescope. While a 1987 explosion in a nearby
galaxy gave astronomers plenty of valuable data, they are hungry for an even
closer look.
? ?Eta Carinae has other unique features, and is the
only star known to produce an ultraviolet (紫外线) laser that is brighter than that
produced by the Sun. Lasers have been observed in other frequencies from a few
stars. |
Which of the following statements about Eta Carinae is NOT true?
A:It will end up as a supernova. B:It can be seen only through binoculars, C:It is the only, star that sends out an ultraviolet laser. D:Its ultraviolet laser is brighter than that of the Sun.
第二篇 Credit Card Only Works When Spoken to
A credit card that will not work unless it hears its owner’s voice could become an important weapon in the fight against fraud(欺骗)．
The card requires users to give a spoken password that it recognizes using a built-in
Voice-recognition chip．The idea is to prevent thieves using a stolen card or fraudsters using someone else’s credit card details to buy goods online．
A model built by engineers at Beepcard in Santa Monica，California，represents the first attempt to pack a microphone。a loudspeaker，a battery and a voice?recognition chip into a standard．sized credit card．
They are not quite there yet：the card is the length and width of an ordinary credit card，but it is still about three times as thick．The company now plans to make it thinner．
The voice card is based on an earlier Beepcard technology designed to prevent fraud in
online transactions This earlier card has no microphone，but has a built?in loudspeaker that it uses to“squawk”(发出叫声)a voice ID signal via a computer’s microphone to an online server．
By verifying(证实)that the signal matches the card details，the server can establish that the user is not simply keying in a credit card number but actually has the card to hand．The ID code changes each time the card is used in a pre—ordered sequence that only the server knows．
This prevents fraudsters recording the beeps，noting the card details and then playing back the audible ID when they key in the details later But this earlier technology cannot prevent fraudulent use of stolen cards The new one can
The new voice card also identifies itself by its ID squawk．but it will not do this until it has verified the legitimate(合法的)user’s spoken password Thieves will be unable to use the card because even if they knew the password they would have to be able to copy the owner’s voice with a high degree of accuracy
The challenge for Beepcard has been to develop voice-recognition and audio circuitry that Can be powered by a mini battery embedded(嵌入的)in a credit card．To maximize battery life，the electronics are only switched on when the card is being used．Pressing a button on the card’s surface prompts it to utter “Say your password ”in female voice If the voice—recognition software proves that the password is authentic(真实的)，it sends its ID squawk which the server then
identifies．allowing the transaction to proceed
The voice credit card is an important invention because
A:it can be made cost-effectively． B:it can leave voice messages， C:it makes online shopping easy D:it makes fraud difficult．
第二篇 Crystal Ear
0ne day a friend asked my wife Jill if 1 wanted a hearing aid．“He certainly does，”replied Jill．After hearing about a remarkable new product，Jill finally got up the nerve to ask me if I’dever thought about getting a hearing aid．“No way，”I said．“It would make me look 20 yearsolder，，No。no，”she replied． ’This is entirely different．It’s Crystal Ear!”
Jill was fight．Crystal Ear is different--not me 01d—styled body worn or over the。ear aid，but An advanced personal sound system so small that it’s like contacts(隐形眼镜)for your ears?And Crystal Ear is super．sensitive and powerful，too。You will hear sounds your ears have been missing for years．Crystal Ear will make speech louder, and the sound is pure and natural?
I could’t believe how tiny it is．It is smaller than me tip of my little finger and it’s almost invisible when worn．There are no wires，no behind-Ⅱle-ear device?Put it m your ear and its ready．to．wear mold(形状)fits comfortably．Since it’s not too loud or too tight，you may even forget that you’re wearing it! Use it at work or at play．And if your hearing problem is worse 111 certain situations，use Crystal Ear only when you need it．
Hearing loss，which occurs typically prior to teenage years，progresses throughout one’ s lifetime．Although hearing loss is now the world’s number one health problem，nearly 90 percent of people suffering hearing loss choose to leave the problem untreated?For many millions，treating hearing loss in a conventional way can involve numerous office visits，expensive testing and adjustments to fit your ear, Thanks to Crystal Ear，the“sound solution”is now convenient?
Almost 90 percent of people with mild hearing loss，and millions more with just a little hearing drop．0ff(下降)，can be dramatically helped with Crystal Ear．Moreover, its superior design 1s energy．efficient，so batteries can last months．Crystal Ear is now available to help these people treat their hearing loss with a small hearing amplifier(放大器)．
One special feature of Crystal Ear is that
A:you can control its volume． B:you needn’t take it off every d毋． C:it is solar?powered。 D:it saves power．
单选集
