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.
I used to be the most determined resolution-maker. Even as a child, I was always goal-centered and loved the feeling of accomplishing things, and every January 1st, I would sit down and write out my resolutions (目标) for the upcoming year. And what resolutions they were! I always picked big goals, like: In the New Year, I will lose 50 pounds! And run a marathon! And study scripture (圣经) every day!
The problem? I’d start out strong, but by February or March, I’d be out of willpower and I’d slide quietly back into my old habits. Every winter, I’d feel guilty and ashamed, looking back at all of the amazing things... I think one of my biggest problems with New Years resolutions was wanting to “dream big” but not having the skills and ability to do those things.
Now I take the opposite approach I’m all about the little goals. First, little goals are easy to set. Instead of saying I’m going to run a marathon, I’ve decided I’m going to run 20 minutes three days a week. Second, little goals are easier to accomplish. Every time I check one of my mini goals off my list, I feel a burst of pride and accomplishment. It’s a great feeling, and I don’t have to wait until the end of the year to enjoy it!
The other great thing about making small goals instead of resolutions is that you can build small goals on top of each other, adding the achievements together. For instance, recently I decided to make sure I ate five servings of fruits and vegetables a day. After a few months, this became a solid habit.
1.Why did the author feel guilty and ashamed?
A.Because she picked big goals as her resolutions.
B.Because she failed to accomplish her resolutions.
C.Because she was looking back at the amazing things.
D.Because she loved the feeling of accomplishing things.
2.How did she change her new year’s resolutions?
A.She put all of her goals together.
B.She checked mini goals off her list.
C.She set small goals instead of big ones.
D.She didn’t make resolutions any more.
3.What did the author want to say in the last paragraph?
A.Small goals are easy to set.
B.Making resolutions is not reasonable.
C.Eating fruits and vegetable is a good habit.
D.Small goal can contribute to big achievements.
4.What can be a suitable title for the text?
A.Setting Small Goals Not Big Ones B.Combining Big and Small Goals
C.Making New Year’s Resolutions D.Setting and Achieving My Goals
Los Angeles is a relatively new and spreading city, which means there’s a big canvas (画布) for architects of many styles to put their 3D stamps on the city. For architecture fans, here are some must-see spots.
Watts Towers
Designed and constructed by Italian-born Simon Rodia over the course of three decades, the 17 towers—the tallest is 100 feet high—consist of metal and found objects such as broken glass, pottery chips (陶器碎片), seashells, etc. You can take a guided tour of this place, learning about the history of this attractive project. 1727 E. 107th St., LA.
Getty Center
Architect Richard Meier’s shining city on a hill took 16,000 tons of marble to build but today it’s a wonder, housing the Getty’s main art collection and offering unbelievable views of Los Angeles. 1200 Getty Center Dr., LA.
Sturges House
Frank Lloyd Wright designed nine different structures throughout Southern California. This was Wright’s first turn away from the textile (纺织) block buildings he’d been designing in California and toward stressing natural factors of the structure to mix with the natural surroundings. 449 N. Skyewiay Rd., LA.
Walt Disney Concert Hall
Frank Gehry has lived in Los Angele s for decade s and hi s world has been se en throughout the city. This one, the Walt Disney Concert Hall, is his most luxurious (奢侈的) building in Southern California. You need not sit through a symphony performance to get a glance at the interior(内饰). The concert hall offers free self-guided audio tours recorded by actor John Litligow. 111 S. Grand Ave., LA.
1.Where should you go to visit Watts Towers?
A.1200 Getty Center Dr., LA. B.1727 E. 107th St., LA.
C.449 N. S kyewiay Rd., LA. D.111 S. Grand Ave., LA.
2.What is special about Sturges House?
A.It is made up of 9 structures. B.It is a textile block building.
C.It fits in well with its environment. D.It is a luxurious building.
3.Who designed Walt Disney Concert Hall?
A.Simon Rodia. B.Richard Meier.
C.John Lithgow. D.Frank Gehry.
假定你是李华，你的英国朋友Peter给你写信，询问你今年春节因新冠病毒肺炎( novel corona-virus)影响而延长的假期是如何度过的。请你给他回信。内容包括：
1.表示感谢；
2.你的学习和生活(如上网课，锻炼等)；
3.你的感想。
注意：1.词数100左右；
2.可以适当增加细节，以使行文连贯。
Dear Peter,
________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________
Your,
Li Hua
假定英语课上老师要求同桌之间交换修改作文，请你修改你同桌的以下作文。文中共有10处语言错误，每句中最多有两处。错误涉及一个单词的增加、删除或修改。
增加：在缺词处加一个漏字符号（∧），并在其下面写出该加的词。
删除：把多余的词用斜线（\）划掉。
修改：在错的词下划一横线，并在其下面写出修改后的词。
注意：1.每处错误及其修改均仅限一词；
2.只允许修改10处，多者（从第11处起）不计分。
Today, if you look at people around, you'll find many of them can be seen play with their cellphones.
Reasons behind this phenomenon is varous. First, haring an easy way to text messages and games, people tend to get addict to cellphones. Beside, cellphones can be a perfect way to kill time. Although using in many ways, cellphones can lead to a series consequences. For instance, students my possible have difficulty concentrating on their schoolwork, that can result in declining grades.
My suggestions on this are as the follows, People should not use cellphones whenever driving. And schools should take actions to ban their use by students.
阅读下面短文，在空白处填入一个适当的单词或括号中单词的正确形式。
In the early years of the Qing Dynasty. Nanhu Lake was a scenic wonderland in Yunnan Province.
In order to get an1.(office) rank, a scholar named Yang studied hard on an island in the middle of the lake. with one stone bridge linked the bank. His wife sent2.(meal) to him every day. She usually made chicken soup with some rice noodle, meat and vegetables. Because of the great distance. when she get there, the food3.(become) cold and unappetizing.
One day, she cooked the food in a heated earthen pot. And she was so surprised4.(find) that the food was will hot when she got to the island. After5.careful study, she found two secrets; there was thick chicken oil on the surface of the soup and the earthen pot did not6.(ready) conduct heat. As a result, the heat of the soup7.(preserve) well.
Since then, the scholar became8.(healthy) and more hardworking. Finally he succeeded in a government ?. He treated his fellow scholars9.the nice noodles with chicken soup. They praised it repeatedly and asked10.the splendid meal was. Thinking of he stone bridge she crossed every day, the wife blurted out (脱口而出) "crossing-over bridge rice noodles".
