Researchers have found, for the first time plants letting out sounds when they are stressed. According to a study a team of scientists recorded tomato and tobacco (烟草) plants producing sound frequencies which humans cannot hear in stressful situations—such as when they experienced a lack of water or their stems (茎) were cut.
Previous research has shown that plants respond to stress by producing several visual and chemical signals. For example, stressed plants may differ in color and shape compared to unstressed plants. Meanwhile, some are also known to let out things in response to drought (干旱) or being eaten.
The latest study, meanwhile, is the first to identify plants making sounds which can be detected over a distance. The team detected the tomato plants made 35 sounds an hour on average when they were exposed to drought conditions, while the tobacco plants produced 11. When the stems of the plants were cut, the tomato plants made 25 sounds an hour on average and the tobacco plants produced 15. As a comparison, unstressed plants made less than one sound per hour on average, according to the study.
The team say that while they only tested tomato and tobacco, it’s possible that other plants could also produce sounds, adding that the latest findings could have an influence on agriculture. “Plant sound production could offer a new way for monitoring crops water state—a question of key importance in agriculture”, the authors wrote in the study more precise irrigation can save up to 50 percent of the water cost and increase the production.
“In times when more and more areas are exposed to drought due to climate change, while human population and consumption keep increasing, effective water use becomes even more important for food security”, they said “Our results, showing the ability to distinguish between drought-stressed and control plants on the basis of plant sounds, open a new direction in the field of precision agriculture.”
1.Which of the following best describes plants’ response to stress in the study?
A.Sing. B.Laugh.
C.Cry. D.Sigh.
2.What can we know from the first 3 paragraphs?
A.Humans can hear the sound produced by plants.
B.Stressed and unstressed plants look the same.
C.Plants in stressful situations make the fewest sounds.
D.Stressed tomato plants make more sounds than tobacco.
3.How can the study help agriculture?
A.Lower the cost. B.Better the quality.
C.Monitor climate change. D.Control the pests.
4.In which section of a newspaper may this text appear?
A.Science. B.Health.
C.Education. D.Culture.
In 2000, a tiny goose was left behind by his parents in our driveway. He was too young to fly and join the adults. So, we had to bring him onto our back porch to ensure his safety. A week later, the young goose had clearly decided we were his new family. We called the little guy Peeper.
A year passed and we were accustomed to the life of taking care of him. Peeper slept on our back porch each night. My dad would spray off all the goose’s droppings daily. Part of this ritual(例行的事)included dad throwing Peeper up into the air so he could fly a loop around the house, coming back again once the porch was clean. One evening, my dad threw him up again, but this time, Peeper just flew off and never back again. Twenty years passed, and Peeper became a fond memory for my family.
Geese live to be around 25 years old, are very loyal, and never forget their first home. Even so, it came as a total shock to me when, in 2019, an aging adult goose made his way back to my family home. At first, I assumed it was just another goose. And yet, something about the lone male seemed oddly familiar to me.
After two weeks of the goose coming back repeatedly, it became clear to me that this wasn't a random goose. He did all of the same things Peeper used to, like trying to come in through the front door and sleeping in our enclosed pool area. In addition to looking like Peeper's old ways, this goose also responded to the name Peeper. Much to my amazement, my old best friend had returned, 20 years later.
This experience has been as meaningful to me as anything in my life. I hope that my children, someday, have the opportunity to connect with nature and a wild being in this same way. People long for connection with the natural world. Through Peeper, I have learned so much about myself and about the nature of love.
1.What did the author's family do to the little goose?
A.He taught him some tricks.
B.They restricted his flight.
C.He tried to drive him away.
D.They took good care of him.
2.What do we know about geese from this text?
A.They depend on human very much.
B.They always remember the first home.
C.They know how to repay human beings.
D.They are good at flying long distances.
3.What does the author think of the reunion with the goose?
A.It is controversial. B.It is quite natural.
C.It is of significance. D.It is accidental.
4.What can be a suitable title for this text?
A.The Reunion of a Family and a Goose
B.A Goose with a Great Memory
C.A Goose Will Eventually Fly Away
D.The Desire to Get on Well with Animals
This is What a REAL Silver Dollar Looks Like
If you trust in the yen, the euro,
and the dollar...stop reading.
Because this is a story about
the sliver coin EVERYBODY wants.
You read the headlines.You know that troubled economic times have put global currency on a rollercoaster(过山车) ride.But millions have found a smarter way to build longterm value with highgrade collectable silver.And right now, those people are lining up to secure some of the last 2012 U．S.Mint Silver Eagles, America's Newest Silver Eagle Dollars. Today, you can graduate to the front of that line.Buy now and you can own these brilliant uncirculated Silver Dollars for only $38.95!
You Can't Afford to Lose
Why are we releasing(发行) this silver dollar for such a remarkable price? Because we want to introduce you to what hundreds of thousands of smart collectors and satisfied customers have known since 1984—New York Mint is the place to find the world's finest highgrade coins.That's why we're offering you this Brilliant Uncirculated 2012 U．S.Silver Eagle for as little as $37.45(plus s/h)．
Timing is Everything
Our advice? Keep this to yourself.Because the more people who know about this offer, the worse it is for you.Demand for Silver Eagles in 2011 broke records.Experts predict that 2012 Silver Eagles may break them all over again.Due to rapid changes in the price of silver, prices may be higher or lower and are subject to(受……影响) change without notice.Supplies are limited.Call immediately to add these Silver Eagles to your holdings before it's too late.
Offer Limited to 40 per household
2012 American Silver Eagle Coin
Your cost 14 Coins $38.95 each＋s/h
59 Coins $38.45 each＋s/h
1019 Coins $37.95 each＋s/h
2040 Coins $37.45 each＋s/h
Note：$10 s/h(shipping and handling) for each purchase
For fastest service, call tollfree 24 hours a day
18882017143
Offer Code(代码) ASE17704
Please mention this code when you call.
New York Mint
14101 Southcross Drive W．， Dept.ASE17704
Burnsville, Minnesota 55337
www.NewYorkMint.com
1.What is stressed in the ad?
A.The coin is of high quality and worth collecting.
B.The coin can be circulated as a currency.
C.Limited supplies guarantee a stable price of the coin.
D.Demand for the coin is bound to break records.
2.If you buy six 2012 U．S.Mint Silver Eagles by post, you should pay at least ________.
A.$230.7 B.$233.7 C.$240.7 D.$243.7
3.The ad strongly encourages people to purchase the silver coins by ________.
A.shopping online
B.making a phone call
C.lining up in front of the stores
D.writing to the company
阅读下面短文，根据所给情节进行续写，使之构成一个完整的故事。
Jo: 15 years old, Amy’s sister, whose ambition is to be a great writer
Amy: 11 years old, Jo’s little sister, who had burned Jo’s manuscripts(手稿) on purpose
Laurie: 15 years old, a boy next door, the sisters’ friend
“There! Jo is a bad sister. She promised I should go skating this time, for this is the last ice we shall have.” Amy complained.
“Don’t say that. You were very naughty, and it is hard for Jo to forgive you for deliberately burning her precious little book. Don’t say anything till she’s cheered up. Go and be a nice girl.” “I’ll try,” said Amy and after a hurry to get ready, she ran after Jo and Laurie.
Jo saw Amy coming along, but she turned her back. She heard Amy had some trouble putting her skates(溜冰鞋) on, but she ignored her and went slowly down the river, taking a bitter, unhappy sort of satisfaction in her little sister’s troubles. Jo allowed her anger to grow strong and take possession of her.
Laurie did not see Amy, for he was carefully skating along the shore, examining the ice with his hockey stick(曲棍球球棍). As He turned the bend(转弯处), he shouted back... “Keep near the shore(河岸). It isn’t safe in the middle.” Jo heard, but Amy was struggling to her feet and did not catch a word.
“No matter whether she heard or not, let her take care of herself.” Jo murmured. Laurie had disappeared round the bend, Jo was just at the turn, and Amy, far behind, striking out toward the smoother(光滑的) ice in the middle of the river.
注意：1.所续写短文的词数应为 120 左右；
1. 至少使用 5 个短文中标有下划线的关键词语；
2. 续写完成后，请用下划线标出你所使用的关键词语。
Paragraph1：
For a minute Jo stood still with a strange feeling in her heart, then she resolved(决心) to go on, but something held and turned her round.
________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________
Paragraph2:
Shivering, dripping, and crying, Jo got Amy home with Laurie’s help, and after an exciting time of it, Amy fell asleep, rolled in blankets before a hot fire.
________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________
假定你是高中学生李华，代表自己班级，邀请Dr.Frost给班级同学做一场关于“如何保持身心健康”的在线讲座。请你写一封信，发出邀请。
要点如下：1.时间，地点2.主题,可简述原因3.期望与感谢
注意：1.词数80左右；
2.可以适当增加细节，以使行文连贯。
Dear Frost，
___________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________
Yours,
Li Hua
语法填空
Kenya signed an 1. (agree) with China in 2013 to construct a new standard railway from Nairobi to Mombasa, part of 2. will run through the Tsavo National Park. The section of the railway that passes through the park is being built at a raised level 3. (allow) space for underpasses(地下通道) for the animals.
The Tsavo National Park is home to Kenya’s 4. (large) elephant group, according to non-profit organization the Tsavo Trust. It says there were over 12,000 elephants in the Tsavo National Park in 2011.
Robert O’brien is Assistant Director of the Tsavo National Park at the Kenya Wildlife Service. He says monitoring the elephants’ movements will help also to reduce the conflict 5. wildlife and humans, which has been 6. key issue in this area.
Sospeter Kiambi, an office worker of the Kenya Wildlife Service elephant programme, 7. (say) the project is 8. (potential) dangerous for both elephants and people, but he also says that 9. (authority) will make full use of this exercise and avoid 10. (make) silly decisions to damage the relation to wildlife.
In all, projects like this one could help elephants and humans live together a little more harmoniously.
