當(dāng)前位置： 2021-2022學(xué)年廣東省廣州市天河中學(xué)高二（上）能力測試英語試卷> 試題詳情

It is often difficult for farmers to identify diseases quickly enough to protect their crops and those on neighboring farms．Now，some farmers are using a simple device directly in the field to find viruses before they spread．
   In Tanzania，several viruses are a threat to cassava crops．Farmers struggle to identify the diseases in an urgent effort to avoid severe crop damage．The disease identification process is often difficult when farmers are acting on their own．If they do not know what is attacking their crops，they cannot decide the best way to fight the disease．A device from British technology company Oxford Nanopore is changing that．The device extracts deoxyribonucleic acid，better known as DNA，from plants．DNA is the carrier of genetic information in nearly all living things．The device helps farmers identify what is harming their crops so they can change to more resistant crops．
   Laura Boykin is with the University of Western Australia and also works with the Cassava Virus Action Project．She brought the device to a Tanzanian farm owned by Asha Mohamed．She said， "We are here collecting leaf punches from infected material to test，to do a DNA extraction and then start sequencing （排序） in the field．" The testing identified a number of viruses in the cassava fields near Mohamed's farm．The process also discovered that plants considered resistant to disease had a very low viral level．Once the viruses were identified，Asha Mohamed was given two kinds of seeds that are resistant to the diseases．
   In another case，DNA was collected from a pawpaw tree farm in Kenya．With that test，the technology was able to identify diseases affecting Naomi Mumo's crops．Naomi Mumo said， "All my pawpaw were affected by a disease，and I didn't know what kind of disease it was．But now，I have people who have identified the disease using new technology，and within a very short time．So I'm very happy．"
   The speed at which farmers identify diseases can mean the difference between the success or failure on large areas of crop land．Now，the use of such simple and easily transportable DNA sequencing devices is making that possible．

（1）What's the main idea of the whole passage？
C
C

A．Farmers In Tanzania struggle to identify the diseases in their crops
B．How Laura Boykin helped Asha Mohamed to identify the viruses．
C．DNA sequencing device helps farmers to find viruses and identify the diseases in their crops quickly．
D．A DNA sequencing device helps farmers to identify the diseases and keep healthy．
（2）Which of the following best explains "extracts" underlined in paragraph 2？
D
D

A．produces
B．creates
C．refuses
D．gets
（3）We can infer from the passage that Naomi Mumo is
B
B
with the DNA sequencing device．
A．relaxed
B．satisfied
C．disappointed
D．a(chǎn)nnoyed
（4）Which of the following is not true according to the passage？
C
C

A．Farmers often have difficulty in identifying diseases in their crops quickly by themselves．
B．DNA carries genetic information in nearly all living things．
C．Both Asha Mohamed and Naomi Mumo are farmers in Tanzania．
D．If farmers can identify diseases in their crops quickly，they can protect their crops and succeed on large areas of crop land．

【考點(diǎn)】說明文．

【答案】C；D；B；C

【解答】

【點(diǎn)評】

聲明：本試題解析著作權(quán)屬菁優(yōu)網(wǎng)所有，未經(jīng)書面同意，不得復(fù)制發(fā)布。

當(dāng)前模式為游客模式，立即登錄查看試卷全部內(nèi)容及下載

發(fā)布：2024/7/5 8:0:9組卷：8引用：4難度：0.8

相似題

1．At the beginning of Grade Two，I joined the cross-country running team in our school.
   When I came to the first practice，I was filled with optimism.But as the distance we ran in each practice gradually increased from three to four，to six miles，I realized with surprise that no matter how hard I tried，I wasn't able to run as fast as others.In fact，I was one of the slowest on the team.
   What was the point of putting myself through so much pain？After the first few weeks，I wanted to quit.
   Then we had our first cross-country meet.
   When we started the race，I felt the great pressure of expectations sink onto my shoulders.And after a while I stopped running and struggled to walk up the hill.But then I heard my coaches shouting my name from the top of the hill.I felt confused and embarrassed；why were they cheering for me？I was running terribly!As I tried my best to finish the race，I realized that my coaches didn't care how fast I ran.Neither did my teammates.During the rest of the season，they were always on the sidelines of every race，cheering for me just as loudly as they'd cheered for the front runner.
   From then on，I began to put my effort into supporting my teammates instead of focusing on my own performance.In that way，I celebrated my teammates' victories as if they were my own；I felt their pain and exhaustion as if they were my own.
   Cross-country running made me realize I don't need to be the best to be successful in life.It taught me to value my relationships with people more than my relationship with my ego.It taught me to cheer for others even if I don't know their names.

（1）Why did the author want to give up after the first few weeks？

A．He had much pain in his knees.
B．He didn't perform well in long-distance running.
C．He couldn't get along well with others
D．He showed no interest in running.
（2）Which of the following can best describe the coaches？

A．Strict and hard-hearted.
B．Brave and adventurous.
C．Considerate and supportive.
D．Optimistic and humorous.
（3）After his first cross-country race，the author

.
A．lost himself in victories
B．put more effort into his study
C．received more support from his coaches
D．started caring about his teammates
（4）What did the author realize from his experience？

A．The importance of team spirit
B．The value of competition
C．The secret of winning a race
D．The benefits of doing sports
發(fā)布：2024/11/7 19:30:1組卷：5引用：7難度：0.5
解析
2．If you are a fruit grower—or would like to become one—take advantage of Apple Day to see what's around.It's called Apple Day but in practice it's more like Apple Month.The day itself is on October 21，but since it has caught on，events now spread out over most of October around Britain.
   Visiting an apple event is a good chance to see，and often taste，a wide variety of apples.To people who are used to the limited choice of apples such as Golden Delicious and Royal Gala in supermarkets，it can be quite an eye opener to see the range of classical apples still in existence，such as Decio which was grown by the Romans.Although it doesn't taste of anything special，it's still worth a try，as is the knobbly（多疙瘩的） Cat's Head which is more of a curiosity than anything else.
   There are also varieties developed to suit specific local conditions.One of the very best varieties for eating quality is Orleans Reinette，but you'll need a warm，sheltered place with perfect soil to grow it，so it's a pipe dream for most apple lovers who fall for it.
   At the events，you can meet expert growers and discuss which ones will best suit your conditions，and because these are family affairs，children are well catered for with apple-themed fun and games.
   Apple Days are being held at all sorts of places with an interest in fruit，including stately gardens and commercial orchards （果園）.If you want to have a real orchard experience，try visiting the National Fruit Collection at Brogdale，near Faversham in Kent.

（1）What can people do at the apple events？

A．Attend experts' lectures.
B．Visit fruit-loving families.
C．Plant fruit trees in an orchard.
D．Taste many kinds of apples.
（2）What can we learn about Decio？

A．It is a new variety.
B．It has a strange look.
C．It is rarely seen now.
D．It has a special taste.
（3）What does the underlined phrase "a pipe dream" in Paragraph 3 mean？

A．A practical idea.
B．A vain hope.
C．A brilliant plan.
D．A selfish desire.
（4）What is the author's purpose in writing the text？

A．To show how to grow apples.
B．To introduce an apple festival.
C．To help people select apples.
D．To promote apple research.
發(fā)布：2024/11/9 20:0:2組卷：22引用：1難度：0.5
解析
3．One animal which is still alive，but has almost disappeared from the world，is the Chinese river dolphin or Yangtze River dolphin.
   The Yangtze River dolphin is a beautiful animal with a graceful body and a long nose.It is blue-grey with a white underside，weighs between 100 and 160 kilogrammes，and can grow up to eight feet long.It lives in the middle and lower parts of the Yangtze River.Most dolphins live in the sea so the Yangtze River dolphin is very unusual.It is one of only five kinds of river dolphins in the world.
   In the past，there were many stories about the Yangtze River dolphin.One story said that the dolphin was really a beautiful princess who had drowned in the river.Another said it was a kind of horse that could gallop（急速行進(jìn)）across water，carrying God on its back.
   Sadly，the situation today is very different.Many millions of people live in the Yangtze River Basin and the river is busy，noisy and polluted.The Yangtze River dolphin is almost blind and moves around using sounds.With so many boats and people using the river，the animals cannot find their way around.They are unable to find food，or find each other.Year by year，the number of Yangtze River dolphin in the river becomes smaller and smaller.
   A lot of work is being done to help the Yangtze River dolphin.One section of the river has been made into a kind of nature park，where the Yangtze River dolphin can be safe.Fishermen work together with scientists and tell them when they see a Yangtze River dolphin，or if they find an injured one.Injured animals are taken to a research center and nursed back to be healthy.However，in spite of these measures，scientists estimate （估計(jì)）that the number of the Yangtze River dolphin still alive in the river may be less than 100.If things continue as they are，the lovely creature will disappear in the next 25 years.

（1）Which of the following cannot be learnt from the passage？

A．The Yangtze River dolphin has already died out from the world.
B．The Yangtze River dolphin is blue-grey with a white underside.
C．The Yangtze River dolphin lives in the middle and lower parts of the Yangtze River.
D．The Yangtze River dolphin is one of only 5 kinds of river dolphins in the world.
（2）The reasons why the Yangtze River dolphin is disappearing don't include

.
A．many millions of people live in the Yangtze River Basin，making there noisy and polluted
B．the Yangtze River dolphin is blind because of the pollution and can't find the way around
C．the boats and people are noisy，making the animals cannot find their way around by sounds
D．they are unable to find food or find each other by sounds since the river is noisy
（3）Which of the following is the correct way to save the Yangtze River dolphin？

A．Catch the Yangtze River dolphins and take them to the research center.
B．Make the whole Yangtze River a natural park for the Yangtze River dolphin to live.
C．Make one section of the Yangtze River a natural park where the Yangtze River dolphins can be safe.
D．Ask many people to come to the river to help the Yangtze River dolphins.
發(fā)布：2024/11/8 18:30:1組卷：5引用：1難度：0.5
解析

把好題分享給你的好友吧~~