When all those May flowers start to show their heads out to say hello,you may see some familiar faces in your backyard.Many plants live and die within one growing season,so gardeners must replant them each spring.But others have developed to live year after year,so they can blossom again.
Many flowers are what we call annuals.Their entire life cycle-form seed to death-takes just one year.They might leave behind sleeping seeds,but the roots and leaves all fade away as-soon as the season is done.Then there are perennials,which can survive for years.Scientists believe these types of plants came first.They do no need to be replanted each season,but save some energy in themselves so that they can show again in the following season.
James Boyer,the vice president for children's education at the New York Botanical Garden,says that annuals probably can survive in areas where there is little water."Annuals are putting all of their chances into the reproduction basket,"Boyer explains."All of the energy to make roots and shoots is just enough to create a big bloom.They will create enough seeds to continue the species.Perennials hide important parts inside protective buds to keep cells fresh until it's time to bloom again.They devote a lot more of their fuel to keeping themselves alive than annuals do.Roots and leaves are repaired and regrow each year.Many eventually produce flowers,but it can sometimes take years.And in most cases,they'll save enough energy to flower again in the following season."
Whether a plant is a perennial or an annual can depend on where you plant it.Plants sold in cold areas that are named as annuals actually could be perennials in hot areas;in warm weather they can live for years,but a single cold winter will wrack them.
Boyer says that researchers are trying to study them."If we could change com into a perennial,we wouldn't need to replant it every year,which destroys the soil and its ecosystem,"Boyer says."It could change our agricultural system."
(1)How can perennials survive into the following season? BB
A.By producing sleeping seeds.
B.By setting aside some energy.
C.By adapting to climate change.
D.By preserving their roots and leave.
(2)Which of the following may James Boyer agree with? CC
A.Their findings are out of expectation.
B.It is easy for perennials to survive with little water.
C.Annuals spend most energy in blossoming and reproducing.
D.Both annuals and perennials prefer warmer growing conditions.
(3)What does the underlined word"wrack"in Paragraph 4 mean? DD
A.Protect
B.Keep.
C.Change.
D.Destroy.
(4)How does the text mainly develop? DD
A.By giving explanation.
B.By offering examples.
C.By drawing conclusions.
D.By making comparisons.
【答案】B;C;D;D
【解答】
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發(fā)布:2024/5/27 14:0:0組卷:1引用:1難度:0.5
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(1)What do the statistics in Paragraph 1 indicate?
A.People pay no attention to e-waste recycling.
B.The recycling rate of e-waste is comparatively low.
C.E-waste has caused serious environmental problems.
D.The amount of e-waste is sharply increasing every year.
(2)What is the disadvantage of current ways of recycling e-waste?
A.They are not environmentally friendly.
B.They only apply to certain e-waste.
C.They generate metals with a complex process.
D.They cause a sharp rise in local temperatures.
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A.It has been applied abroad.
B.It releases no poisonous gas.
C.It recovers metals by microbes.
D.It promotes the local export trade.
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A.a(chǎn) travel guide
B.a(chǎn) fiction novel
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D.a(chǎn) scientific journal發(fā)布:2025/1/1 17:30:2組卷:1引用:2難度:0.6 -
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B.People's various remarks on penguins.
C.Some penguins' sufferings in a gully.
D.Ways of filming the series Dynasties.
(2)Who holds a positive attitude towards human interference?
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C.Paul Nicklen.
D.Kathryn Shaw.
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A.Making one confused.
B.Making one heartbroken.
C.Putting one in danger.
D.Putting one in place.
(4)What can be the best title for the text?
A.Necessity of Lending a Hand to Animals
B.Protect Animals From Dying Out
C.Human Interference on Dangerous Animals
D.Help Animals in Trouble or Not發(fā)布:2025/1/1 17:30:2組卷:2引用:3難度:0.5 -
3.The history of Azerbaijani cinema dates back to the end of the 19th century,during which,many excellent movies have been filmed,which are still watched and admired by everyone.
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However,this is not the only movie that was filmed in the Old City.For example,in the films Amphibian Man and The Diamond Arm,you can see the streets well known to every Azerbaijaní.
(1)What can we know about Arshin Mal Alan?
A.It was filmed before 1945.
B.It is popular around the world.
C.It is an action film with amazing plot.
D.It can be viewed in black and white only.
(2)What is the Eastern rule about marriage in Arshin Mal Alan?
A.A man must be rich in order to marry his bride.
B.A man must dress up as a seller at the wedding.
C.A man mustn't see his bride's face before the wedding.
D.A man must buy a house for his bride before the wedding.
(3)Why does Asker dress up as a seller of cloth?
A.To choose a bride.
B.To make a film.
C.To work in the street.
D.To earn more money.
(4)What is the text mainly about?
A.The street culture in Azerbaijan.
B.The history of black-and-white TV.
C.A love story between Asker and his bride.
D.A famous movie filmed in Old City—Icharishahar.發(fā)布:2025/1/1 17:30:2組卷:0引用:4難度:0.3
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