當(dāng)前位置：
試題詳情
When Gitanjali Rao shared how she likes "finding solutions to real problems"，it was hard to imagine this clever girl could settle a problem that had escaped scientists for years.
In just three months，Rao came up with a device that can replace the costly and lengthy tests nowadays used to reliably determine lead（鉛）levels in our fresh water.Inspired by the current litigation（訴訟）in Flint，Michigan，a case of water pollution from 2014 until present，Rao designed a new testing system that resulted in her being named "America's top young scientist"for 2017.
Rao had been following the water problem for about two years.She was amazed by the number of people affected by lead pollution in water and wanted to do something to change this.Rao spent months trying to convince local high schools and colleges to give her lab time to continue her experiment.At home，Rao worked on her project in the "science room" she asked her parents to create for her.Rao has created a device that uses three parts：a cartridge，a Bluetooth reader and an app.To put it simply，the cartridge contains carbon nanotubes（納米管） that react to lead.This reaction is then registered by the Bluetooth reader，which sends a signal to a mobile app that can tell you immediately if your water is safe to drink.
Rao appropriately named the device Tethys and is hoping to make a little improvement to get the device on the market.While we may not be aware of any lead pollution present in our aging pipelines，lead poisoning can cause delays in physical and mental development.With Rao believing that the "purpose of science is to make a difference"，her incredible invention could make a difference to millions of people in the United States.
（1）What do we know about Rao's device？ AA
A．It's cheap and quick.
B．It's cheap and inaccurate.
C．It's expensive and reliable.
D．It's portable and time-consuming.
（2）What made Rao have the idea of designing the device？ DD
A．Her parents' suggestions.
B．Her desire for winning the award.
C．Her interest in settling real problems.
D．The water pollution litigation in Flint.
（3）What do the carbon nanotubes function as？ BB
A．Sending immediate signals.
B．Detecting the presence of lead.
C．Recording the reaction results.
D．Showing the water quality results.
（4）What does the author think of Rao's invention？ BB
A．It will lead Rao to make a fortune.
B．It will help millions of Americans drink safe water.
C．It will promote the development of science in America.
D．It will soon settle the lead polluted problem thoroughly.
【答案】A；D；B；B
【解答】
【點(diǎn)評(píng)】
聲明：本試題解析著作權(quán)屬菁優(yōu)網(wǎng)所有，未經(jīng)書(shū)面同意，不得復(fù)制發(fā)布。
發(fā)布：2024/4/20 14:35:0組卷：0引用：1難度：0.5
相似題
-
1．During my first three years of college，I put on weight quickly.Between classwork and a part-time job，I had zero time for（1）
.Besides，I ate a lot of fast food.Not surprisingly，I（2）a fat stomach.
After leaving college，I（3）to take exercise.Invited by a friend，I（4）working out with exercise machines three times a week.I was the kind of person who did not try something（5）.I ate the same food；I did the same thing.M friend，however，became（6）.One day，he said， "We're not getting enough exercise.We should play tennis instead."
Me？Play tennis？No way.I was strongly against his（7）.I was not good at sports and I was（8）the exercise machines.（9），weeks later，I found myself standing on a tennis court （球場(chǎng)）.As I held my racket （球拍），I felt（10）.I ran after every ball he served to me，completely（11）about 90% of them，hitting the rest into the other court.
The first few months were quite（12）.But one day，as the ball came flying toward me，my racket and the ball finally met in the place where it is most effective to hit a ball.I watched（13）as my return landed where I had aimed （瞄準(zhǔn)） it.I had finally（14）how to play tennis properly!
I learned a（15）during my journey toward learning to play tennis：I can do whatever I set my mind to.（1） A．games B．holidays C．research D．exercise （2） A．got B．wanted C．hated D．protected （3） A．decided B．a(chǎn)greed C．regretted D．continued （4） A．a(chǎn)voided B．imagined C．began D．minded （5） A．important B．new C．simple D．similar （6） A．busy B．careless C．bored D．lazy （7） A．rule B．job C．reply D．idea （8） A．worried about B．happy with C．sure of D．responsible for （9） A．As usual B．At first C．Besides D．However （10） A．silly B．relaxed C．proud D．satisfied （11） A．controlling B．throwing C．missing D．playing （12） A．interesting B．painful C．different D．easy （13） A．in secret B．in anger C．in fear D．in surprise （14） A．a(chǎn)sked B．learned C．taught D．remembered （15） A．lesson B．skill C．business D．task 發(fā)布：2025/1/6 16:30:6組卷：0引用：1難度：0.2 -
2．There was once a captain.jye.ai loved money so much that he cheated（欺騙）his sailors（水手）at the end of every voyage（遠(yuǎn)航）and took their wages（工資）.
On the last day of one voyage，the ship was in a small port.It was winter time，and these a was very cold，so the captain said to his sailors， "If one of you stays in the water during the whole night，I will give him my ship.But if he comes out before the sun appears，I shall get his wages."
The sailors had heard about the captain's cheating，so they didn't trust him.But then one of them，who thought that he was cleverer than the captain，said that he would do it.He got into the water，and，though it was very cold，he stayed in it.When it was nearly morning，some fishermen lit a fire on the shore about half a mile away.
"You are cheating，" the captain said to the sailor. "The fire's warming you."
"But it's half a mile away!" said the sailor.
"A fire's fire，" answered the captain. "I have won."
The sailor came out of the water，and said， "Perhaps you think that you are clever because you have won my wages，but you can't cook a chicken."
"I can，" answered the captain.
"If you cook this chicken，" said the sailor， "I shall work for you without wages for seven years，but if you can't，you will give me your ship."
The captain agreed，took the chicken and said， "Where's the fire？"
"There it is，" answered the sailor. "On the shore."
"But it's half a mile away，" said the captain angrily.
"'A fire's fire' you said，" answered the sailor. "If it is enough to warm me in the water，it is enough to cook your chicken."
（1）The captain got the sailors' wages.
A．to buy a chicken for himself
B．a(chǎn)nd kept the money for future use
C．by cheating him
D．a(chǎn)nd said he would return the money soon
（2）Which of the following statements is TRUE？
A．All the sailors refused to get into the water because it was too cold
B．The captain knew that the fire the fishermen made was enough to warm the sailor in the water.
C．The captain succeeded in cheating the sailor.
D．It was the sailor who was cleverer.
（3）The captain insisted that the fire was warming the sailor because he.
A．didn't want to lose the bet
B．didn't believe the sailor's success
C．wanted to keep his promise
D．wanted to show his cleverness
（4）What is the title of the story？
A．How a Captain Cheated His Sailor
B．How a Sailor Got a Ship
C．A Brave Sailor
D．A Fire Is Fire發(fā)布：2025/1/6 16:30:6組卷：1引用：1難度：0.5 -
3．A professor stood before his philosophy class and had some items in front of him.When the class began，he（1）
a large，empty jar and filled it with golf balls.
He asked the students if the（2）was full.They agreed that it was.
The professor picked up a box of pebbles and poured it into the jar.He（3）the jar lightly.The pebbles rolled into the open areas（4）the golf balls.
He asked the students again if the jar was full.They agreed that it was.
The professor（5）picked up a box of sand and poured it into the jar.（6）the sand filled up everything else.
He asked once more if the jar was full.The students（7）with unanimous（一致的） yes.
The professor then produced two cups of coffee from under the table and poured them into the jar，filling the（8）space between the sand.The students laughed.
"Now，" said the professor， "I want you to recognize that this jar（9）your life.The golf balls are the（10）things：family，children，（11），friends and favorite passions.Things，that if everything else was（12）and only they remained，your life would still be full.The pebbles are the things that（13），like your job，house，and car.The sand is everything else—the small staff."
"If you put the sand into the jar（14），there is no room for the pebbles or the golf balls.The same（15）for ljye.aie.If you spend all of your time and energy on the small stuff，you will never have room for the things that are important to you.So pay attention to the（16）that are critical to your happiness.Take care of the golf balls first.Set your（17）.The rest is just sand."
One student raised her hand and asked what the（18）represented.
The professor smiled and said， "I'm glad you asked.It just goes to show you that no matter how（19）your life may seem，there's always（20）for a couple of cups of coffee with a friend."（1） A．took out B．picked up C．set about D．put up （2） A．box B．bottle C．jar D．cup （3） A．shook B．touched C．closed D．hit （4） A．with B．through C．under D．between （5） A．even B．next C．soon D．a(chǎn)gain （6） A．All of a sudden B．Of course C．So far D．Beyond expectation （7） A．reacted B．said C．responded D．reflected （8） A．empty B．large C．wide D．open （9） A．expresses B．contains C．represents D．shows （10） A．important B．entertaining C．interesting D．ordinary （11） A．possessions B．money C．health D．fame （12） A．tested B．tried C．finished D．lost （13） A．shine B．matter C．contribute D．influence （14） A．a(chǎn)lso B．either C．first D．last （15） A．goes B．a(chǎn)pplies C．happens D．comes （16） A．health B．things C．friends D．children （17） A．priorities B．jars C．limits D．examples （18） A．sand B．passion C．life D．coffee （19） A．hard B．empty C．full D．happy （20） A．room B．time C．money D．fun 發(fā)布：2025/1/6 16:30:6組卷：1引用：1難度：0.6