The world is being covered by plastic.In China，the amount of plastic waste rose into 14 million kilograms last year，but only about 9% was recycled.Over 1.32 million kilograms of plastic found its way into the world's oceans，which caused serious pollution.Luckily，researchers have found a special kind of bacteria which can help break down plastic recently.
The bacteria are so small that we need a microscope （顯微鏡） to see them.They can "eat" plastic by changing its chemicals into something that will help them grow.The secret to this is enzymes （酶）.Bacteria uses enzymes to cause chemical changes.
In 2012，in the decaying （腐爛的） leaves，scientists discovered an enzyme called LCC that slowly broke down PET plastic.Most people know PET plastic.It is used in water and soda bottles.Most PET is thrown away，but even when it is recycled，it can't be made into new bottles.Compared with other 100，000 enzymes，it was the best at breaking down PET.
To improve LCC，scientists studied the enzyme and the way it broke down the PET.By testing thousands of small changes to the enzyme，they found a new kind of LCC．It can be alive at higher temperatures，eat PET very quickly and make most PET plastic reusable.Scientists were satisfied with the result.When the environment was just right，the new LCC was able to break down 90% of the PET in just ten hours.The old enzyme took about 20 hours and only broke down half of the PET.
（1）How many plastic products are recycled in China last year？ CC
A．About 1.32 million kilograms.
B．About 14 million kilograms.
C．About 1.26 million kilograms.
（2）Which statement is TRUE about the bacteria？ CC
A．Bacteria can be seen with our eyes directly.
B．Bacteria can't be used to break down plastic.
C．Enzymes help bacteria change chemicals in plastic.
（3）From Paragraph 3，we can know CC.
A．most PET plastic could be made into new bottles again
B．a(chǎn)n enzyme called LCC was found in PET plastic in 2012
C．LCC was found the best at breaking down PET plastic
（4）Compared with the old LCC，which is NOT the advantage of the new kind of LCC？ BB
A．It can be alive at higher temperatures.
B．It can make all the PET plastic reusable.
C．It can break down PET plastic in a faster way.
（5）Where can we probably read this passage？ BB
A．In a storybook.
B．In a science report.
C．In an advertisement.
【答案】C；C；C；B；B
【解答】
【點評】
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發(fā)布：2024/12/3 9:30:3組卷：11引用：4難度：0.6
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1．
（1）Which of the following can help find family members？
LynQGetting separated from friends or a family member at a music festival can be a real headache.LynQ helps you find your loved ones when you get separated from the group.Unlike your smartphones，this small thing does not need any Wi-Fi to stay connected.It is a great tool for family vacations. 
Philips SomneoThe company Philips has something to help you get up earlier in 2022.The Philips Somneo is here to help you wake up better，without the very annoying（煩人的） sounds of a traditional alarm clock.The Somneo creates what is like a natural sunrise each morning while helping with your sleeping habits. 
EargoThe American company，Eargo is here to add a little excitement to the hearing aid（助聽器） market.With 48 million Americans having hearing problems，the team hopes that their easy-to-use comfortable product will give these people the ability to hear again.
A．LynQ.
B．Eargo.
C．Philips Somneo.
（2）How does the Philips Somneo work？
A．By playing soft music.
B．By creating sunrise scenes.
C．By sending out smell.
（3）What is the purpose of the three inventions？
A．To form good habits.
B．To help the disabled.
C．To make life easier.發(fā)布：2024/12/18 5:30:3組卷：3引用：2難度：0.5 -
2．How Soccer Can Help Us Understand Physics Sports provide a great way to understand some concepts（概念） in physics.Physics，after all is the study of matter，motion（運動），force，and energy.And since sports liken soccer，swimming and cycling involve bodies moving through space，they can help us understand how the principles of physics work.
Imagine that you're looking at a soccer ball on a grassy field.If you do nothing to the ball，it will stay motionless on the grass.If you kick the ball，it will roll along the grass before coming to rest again.Pretty simple ，right？
For thousands of years，though，people thought that objects like this soccer ball come to rest because they have a natural tendency to stop.It took a famous physicist by the name of Sir Isaac Newton，who lived in the 1600s，to prove that this was not exactly correct.
Newton suggested that objects like the soccer ball have a natural tendency to keep moving.The only reason they stop，he believed，is because an unbalanced force acts on them.By an unbalanced force，Newton meant the force applied to the soccer ball by its environment.When kicked，the surface of the ball travels over the grass，creating friction（摩擦力）.The taller the grass，and the rougher the surface of the ball，the more friction is created.And the more friction that exists between the ball and the grass，the less it will travel after being kicked.
Now，imagine that there is no grass.Instead，the ball is resting on a frozen lake.When you kick the ball on the ice，the ball will go much farther than it would have on the grass.This is because ice provides a lot less friction than the grass.
Even so，ice does cause some friction.The ball's interaction with the frozen water crystals on the surface of the lake eventually causes it to come to rest again.But now imagine that instead of ice，the ball is in a place where there's no friction at all.The ball is floating in a vacuum.If you remove friction entirely，kicking the soccer ball would cause it to keep going and going at the same speed，until some force caused it to slow down and sjye.aip.To paraphrase Sir Isaac Newton，a soccer ball on the grass will stay where it is unless acted on by a force.Similarly，once you kick the ball，it will remain in motion unless acted on by force.This，in so many words，is known as Newton's First Law of Motion.
（1）According to the passage ，once an object like a soccer ball is in motion，it has a natural tendency to.
A．stop
B．slow down
C．keep moving
D．change direction
（2）What does the writer explain in the passage？
A．The idea of motion，using sports as examples.
B．The force of friction，using music as examples.
C．The sport of soccer，using examples of teams and players.
D．The importance of understanding the concepts in physics.
（3）What does the underlined word "tendency" mean？
A．A very small chance of something happening.
B．A fifty-fifty chance of something happening.
C．The way something normally behaves or acts.
D．The fear of doing something or acting in a certain way.
（4）The passage is mainly about.
A．the motion of objects
B．the life of Sir Isaac Newton
C．why we have to learn physics
D．why we kick the ball on a grassy land發(fā)布：2024/12/20 0:30:1組卷：32引用：2難度：0.3 -
3．The city of Changchun ，Jilin province gut something special，on Sept 13-its first 3 D-painted bus that gives a feel of diving into the sea and coming into close contact with it.
The idea for the bus ，which belongs to the Beidu Co，came from Wang Zhi，an employee who took part in its creation competition not long ago .and who comments（評論）"I've seen 3 D buses in other cities and suggested that we have one here. "
The bus，which is also decorated by sea dolls and handicrafts like"dolphins" ，and"starfish" ，runs from Yanminghu villa to the lakeside street and stops at Beilhuancheng Rd.They choose "Sea Tour"as the theme because the color blue and cute creatures might make passengers more relaxed .especially in traffic jams ，says Wang.
Mrs.Liu，who is one of the first passengers ，says，"It's great and I feel like I'm diving into the sea."
"I take the bus to work every day and the decoration makes me feel good on the way，" says Zhang Min，a citizen（市民）in Changchun.
Some passengers ask the driver for the bus timetable ，saying they want to bring their families and friends to enjoy the fun ，while the driver ，Gu Zhenning ，says，"I'm even happier than the passengers working in such a comfortable environment.
The company says it will promote the use of these buses to make the ride more comfortable and enjoyable.
（1）Where did the first 3 D-painted bus appear？
A．In Shanghai.
B．In Beijing.
C．In Jilin.
D．In Zhejiang.
（2）They choose the theme sea tour because.
A．they want the passengers to feel more relaxed
B．they want to attract more passengers to take the bus
C．it is the cheapest of all the themes
D．the driver wants the theme sea
（3）How does Mrs.Liu feel when she took the bus？
A．Sad.
B．Crazy.
C．Terrible.
D．Excited.
（4）What's the best title（ 標(biāo)題）of the passage？
A．A Great Bus Driver
B．The First 3 D-painted Bus in Changchun
C．The Theme Sea Tour
D．How to Relax on a Bus發(fā)布：2024/12/17 23:30:8組卷：0引用：1難度：0.5
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