Dolphins make a wide range of communicative sounds and also display something called vocal learning, which is the ability of an animal to modify its vocalization(声音)based on its experience with other animals.
Mainly, there are three types of dolphin vocalizations: whistles, clicks, and burst pulses. People still don’t know their precise meanings, but people do know that dolphins use their vocalizations as a way to communicate with one another.
The dolphin whistles are very high frequency sounds, partially above the range of human hearing. What’s fascinating is that each dolphin has a signature whistle, which is unique to each individual dolphin. It allows them to call to or identify each other.
No two signature whistles are same-sounding. As members of the same family, their signature whistles have similar elements. Dolphins use them as a contact calls. They call to each other while travelling and searching for food. It helps keep the group together and helps mother and children find each other. The uniqueness of each dolphin’s signature whistles is just like the following example: if you were travelling in the forest with one other person who was just out of sight, you would call out, “Are you there?” and the other person would respond. But if there were several people in the forest, you would have to call that person’s name.
In addition to whistles, dolphins produce clicks, which are actually sonar or sound waves. They use clicks to communicate, but more importantly to navigate and hunt. How? The sonar clicks bounce off objects and then the dolphins convert the incoming signals into a three dimensional picture, a mental map of what’s around them. The clicks are extremely sensitive and accurate. The sonar clicks are also very strong. One reason why dolphins swim side by side is to avoid interference from each other’s sonar clicks. Interference would be confusing and it would prevent them from getting an accurate picture of their surroundings. And what’s interesting is dolphins will turn off their sonar when another dolphin passes in front.
The third category of dolphin vocalizations is burst pulses. These are all the other sounds the dolphin makes-squeals, barks, groans and so on. Burst pulses are used to display dislike, claim their living area and attract a mate.
1.What is the reading passage mainly about?
A.How dolphins produce songs they want.
B.How dolphins teach their young to identify signature whistles.
C.How dolphins swim side by side to hunt.
D.How dolphins communicate with one another in various ways.
2.According to the reading passage, why do dolphins travel side by side?
A.To show how united they are as a group.
B.To hear each other’s signature whistles.
C.To avoid interference with other dolphins’ sonar clicks.
D.To keep mothers close to their young.
3.What does the underlined word “example” in paragraph 4 illustrate?
A.The differences between land and marine mammals.
B.The importance of burst pulses as a way dolphins communicate.
C.One reason dolphins travel in large groups.
D.One way dolphins use signature whistles.
4.Which of the following statements is NOT right according to the passage?
A.Human can easily hear the dolphin signature whistles.
B.A male dolphin shows his love to a female by using burst pulses.
C.Dolphins know what is around them by analyze the sonar they receive.
D.Dolphins can adjust their vocalizations to the surroundings.
高三英语阅读选择中等难度题
Dolphins make a wide range of communicative sounds and also display something called vocal learning, which is the ability of an animal to modify its vocalization(声音)based on its experience with other animals.
Mainly, there are three types of dolphin vocalizations: whistles, clicks, and burst pulses. People still don’t know their precise meanings, but people do know that dolphins use their vocalizations as a way to communicate with one another.
The dolphin whistles are very high frequency sounds, partially above the range of human hearing. What’s fascinating is that each dolphin has a signature whistle, which is unique to each individual dolphin. It allows them to call to or identify each other.
No two signature whistles are same-sounding. As members of the same family, their signature whistles have similar elements. Dolphins use them as a contact calls. They call to each other while travelling and searching for food. It helps keep the group together and helps mother and children find each other. The uniqueness of each dolphin’s signature whistles is just like the following example: if you were travelling in the forest with one other person who was just out of sight, you would call out, “Are you there?” and the other person would respond. But if there were several people in the forest, you would have to call that person’s name.
In addition to whistles, dolphins produce clicks, which are actually sonar or sound waves. They use clicks to communicate, but more importantly to navigate and hunt. How? The sonar clicks bounce off objects and then the dolphins convert the incoming signals into a three dimensional picture, a mental map of what’s around them. The clicks are extremely sensitive and accurate. The sonar clicks are also very strong. One reason why dolphins swim side by side is to avoid interference from each other’s sonar clicks. Interference would be confusing and it would prevent them from getting an accurate picture of their surroundings. And what’s interesting is dolphins will turn off their sonar when another dolphin passes in front.
The third category of dolphin vocalizations is burst pulses. These are all the other sounds the dolphin makes-squeals, barks, groans and so on. Burst pulses are used to display dislike, claim their living area and attract a mate.
1.What is the reading passage mainly about?
A.How dolphins produce songs they want.
B.How dolphins teach their young to identify signature whistles.
C.How dolphins swim side by side to hunt.
D.How dolphins communicate with one another in various ways.
2.According to the reading passage, why do dolphins travel side by side?
A.To show how united they are as a group.
B.To hear each other’s signature whistles.
C.To avoid interference with other dolphins’ sonar clicks.
D.To keep mothers close to their young.
3.What does the underlined word “example” in paragraph 4 illustrate?
A.The differences between land and marine mammals.
B.The importance of burst pulses as a way dolphins communicate.
C.One reason dolphins travel in large groups.
D.One way dolphins use signature whistles.
4.Which of the following statements is NOT right according to the passage?
A.Human can easily hear the dolphin signature whistles.
B.A male dolphin shows his love to a female by using burst pulses.
C.Dolphins know what is around them by analyze the sonar they receive.
D.Dolphins can adjust their vocalizations to the surroundings.
高三英语阅读选择中等难度题查看答案及解析
Volunteer With CarePartners
CarePartners volunteer opportunities cover a wide range of needs and areas，so whatever your interests, talents or skills are, we can find the fit that works for you.
Retail Volunteers
Interested in volunteer work at the Hospice Thrift Store or Estate Sales? Check out the list of opportunities, or sign up now. Volunteers are also needed to assist in Rehabilitation Hospital Gift Shop. For more information, please contact Sharon Peareon at 828-277 4888
Special Event Volunteers
Drums and Dragons — This is a brand-new fundraising event. Dozens of volunteers managed a dragon boat race. Visit the event website for Drums and Dragons. For updates about this unique and competitive event, please “like” our FaceBook page, Drums and Dragons. To join the race, please contact John Napolitano at 828-277-4816.
Little Trees Project — For over ten years, the Little Trees
Project has been delivering decorated trees to patients served by CarePartners programs. Last year, school children and adult volunteers decorated nearly 800 trees with handmade decorations and heartwarming notes. For more information, please contact Lynn Blankenship at 828-777-2827.
Hospice Volunteer Application Process
If you ’ re interested in becoming a Hospice volunteer, you will need to fill out an application ,sign a confidentiality agreement, and provide two references. Once your application is received, we will arrange a personal interview so that we can answer your questions and become more familiar with your interests and availability. If you are specifically interested in working with Hospice patients, call Danny Johnson at 828-274-9567.
1.Who can help you become a voluntary shop assistant?
A. Danny Johnson. B. Sharon Pearson.
C. John Napolitano. D. Lynn Blankenship.
2.Why do CarePartners members hold a dragon boat race?
A. To seek volunteers for the organization.
B. To improve the health of its volunteers.
C. To collect money far the organization.
D. To win “likes” for its FaceBook page.
3.What does the Little Trees Project mainly do?
A. Decorate trees for sick children.
B. Plant trees to help poor patients.
C. Produce handmade trees for decoration.
D. Present the patients with decorated trees.
高三英语阅读理解中等难度题查看答案及解析
Given a wide range of available entertainment options and the way we consume information, visits to the library may seem like an old-fashioned entertainment. But according to a new Gallup poll (民意调査),Americans took more trips to the library than to the movie theater in 2019. The poll surveyed 1,025 adults throughout the United States who were asked how many times they participated in nine different leisure (休闲)activities, including visiting a library, watching a movie, or attending a sporting event. Library visits came out on top as the favorite, with those surveyed visiting an average of 10.5 times annually. Movies were second with respondents heading to the cinema an average of 5.3 times throughout the year. The zoo came in the last place with only 0.9 visits.
Although it’s not the only determining factor, cost appears to play a part. Activities at the bottom of the list such as theme parks and zoos are typically expensive. Libraries are free, as are many of their available services like Wi-Fi, in addition to the endless amounts of books. A Pew Research Center study indicated that although most people visit libraries to check out reading materials, 29% of surveyed Americans over the age of 16 use libraries for computers, Internet and public Wi-Fi.
People between ages 30-49 were most likely to engage in leisure activities, according to the Gallup poll. This was perhaps because of “their relative youth combined with mid-life stability” Gallup’s Justin McCarthy told Smithsonian. McCarthy also notes that libraries are typically visited most often by adults from low-income households and less often by adults from high-income households. In this poll, the youngest age group—those who are 18 to 29 years old—visited the library the most. This could be because college students are in that group.
Regardless of the reasons why people visit libraries, they’re far from outdated. Libraries have stood the test of time, which is good news for book lovers, those needing to drop in for Internet use, or anyone just looking for some quiet time. If there was ever any doubt that libraries would simply fade away, research suggests that they’re not going anywhere anytime soon.
1.Which activity ranks last according to the survey?
A.Going to a library.
B.Visiting the zoo.
C.Attending a sporting event.
D.Watching a movie in the theater.
2.What can be inferred from paragraph 2?
A.Age plays a key role in going to a library.
B.Teenagers go to libraries mainly for free Wi-Fi.
C.Theme parks and zoos are less favored among the young.
D.The majority of Americans visit libraries mainly for reading materials.
3.Who visit libraries most according to McCarthy?
A.Adults with high income.
B.People between ages 30-49.
C.The young at the age of 18 to 29.
D.Teenagers from low-income households.
4.What can be the best title for the text?
A.Why people love reading more than ever
B.We love movies, but we love libraries more
C.Reading in libraries makes you a better person
D.Why more young people go to libraries for free Wi-Fi
高三英语阅读理解中等难度题查看答案及解析
Reading has been linked to a wide range of mental, physical, and social health benefits. Here’s what to expect when you become a regular reader.
You’ll keep your brain in top shape. Research has found that reading stimulates the brain, helping the brain function properly for the long term.1., reading is one of the most affordable and accessible brain boosters.
You’ll become more empathetic. Reading can boost your ability to understand the feelings, thoughts, and experiences of other people. 2..
You’ll reduce stress. In one study, reading was found to be one of the most effective ways to reduce stress. 3.. If you want to cheer up quickly, pick up a book.
You’ll fall asleep easier. Developing a calming bedtime routine is helpful for anyone looking to fall asleep faster.4., give up alcohol, electronics, and cigarettes before bed and pick up a book instead, for reading is a great way to relax before turning off the light.
You’ll become more interesting. 5.. And that means readers can not only teach themselves new skills or knowledge, but also share it with other people.
A. It proved even more effective than listening to music, talking a walk, or drinking a cup of tea
B. In order to satisfy yourself
C. In other words
D. For better sleep
E. And that means you’ll be better to form meaningful relationships with others
F. Develop a consistent reading plan and stick to it
G. Reading allows us to learn new things and expand our minds
高三英语七选五中等难度题查看答案及解析
My wife and I were attending a wedding at St. John’s Church. The sound of ______ rang to the heavens as the ceremony continued.
At the church, I ______ an old friend, Casper, who happened to be at the ______. Now 73, Casper was a brilliant and ______ softball pitched (投球手) back in the Men’s Leagues of Philadelphia in the mid-60s. I did not ______ the now silver-haired fellow until my brother-in-law John mentioned his name to me! After a very pleasant ______, Casper asked if I remembered a letter of ______ I had written to him back in 1964. It appeared Casper fell on hard times, as professional pitchers ______ do, and he wasn’t pitching too well for a period of time. I did not ______ the letter, but he said, “Yes, I still have it, and I read it anytime ______ aren’t going too well.” He said that he had read the letter many times, and the situation always seemed to improve. I was ______ and speechless!
He continued, “You don’t remember?” I said, “Sadly, no, I don’t.” but I did ask if I could have a(n)______ of the letter. He said he would email it to me. After the ______, we met on the steps of the church. Casper came up to me and ______ the letter. He lived a block from the ______ and had run home to get it. The envelope was ______ and turned yellow, and so was the letter inside. That letter had to be nearly 50 years old.
In ______ term, the letter read:
“These hard times are ______! Keep your enthusiasm for the ______. Never quit and you will be back on top again ______. Hang on there!”
1.A. wind B. music C. traffic D. fireworks
2.A. took over B. ran into C. picked up D. called on
3.A. meeting B. service C. scene D. position
4.A. limited B. balanced C. devoted D. talented
5.A. invite B. recognize C. disturb D. inform
6.A. discussion B. shaking C. journey D. greeting
7.A. apology B. appreciation C. encouragement D. introduction
8.A. sometimes B. entirely C. rarely D. forever
9.A. receive B. write C. remember D. preserve
10.A. jobs B. things C. stages D. effects
11.A. pleased B. disappointed C. puzzled D. annoyed
12.A. address B. copy C. record D. opinion
13.A. party B. break C. wedding D. incident
14.A. dropped B. delivered C. opened D. presented
15.A. theatre B. church C. office D. station
16.A. folded B. faded C. painted D. divided
17.A. gentle B. patient C. modest D. simple
18.A. reasonable B. temporary C. relative D. impressive
19.A. game B. prize C. glory D. lesson
20.A. casually B. properly C. totally D. shortly
高三英语完形填空中等难度题查看答案及解析
My wife and I were attending a wedding at St. John’s Church. The sound of _______ rang to the heavens as the ceremony continued.
At the church, I _________ an old friend. Casper, who happened to be at the _________. Now 73, Casper was a brilliant and _________ softball pitcher （投球手） back in the Men’s Leagues of Philadelphia in the mid-60s. I did not _________ the now silver-haired fellow until my brother-in- law John mentioned his name to me! After a very pleasant _________, Casper asked if I remembered a letter of _______ I had written to him back in 1964. It appeared Casper fell on hard times, as professional pitchers _________ do, and he wasn’t pitching too well for a period of time. I did not _______ the letter, but he said, “Yes, I still have it, and I read it anytime ____________ aren’t going too well.” He said that he had read the letter many times, and the situation always seemed to improve. I was __________ and speechless!
He continued, “You don’t remember?” I said, “Sadly, no, I don’t.” But I did ask if I could have a(n) ____________ of the letter. He said he would email it to me. After the ____________, we met on the steps of the church. Casper came up to me and __________ the letter. He lived a block from the ____________ and had run home to get it. The envelope was __________ and turned yellow, and so was the letter inside. That letter had to be nearly 50 years old.
In ______________ terms, the letter read:
“These hard times are ____________ ! Keep your enthusiasm for the ____________. Never quit and you’ll be back on top again __________. Hang on there!”
1.A. wind B. music C. traffic D. fireworks
2.A. took over B. ran into C. picked up D. called on
3.A. meeting B. service C. scene D. position
4.A. limited B. balanced C. devoted D. talented
5.A. invite B. recognize C. disturb D. inform
6.A. discussion B. shaking C. journey D. greeting
7.A. encouragement B. appreciation C. apology D. introduction
8.A. sometimes B. entirely C. rarely D. forever
9.A. receive B. write C. remember D. preserve
10.A. jobs B. things C. stages D. effects
11.A. pleased B. disappointed C. puzzled D. annoyed
12.A. address B. copy C. record D. opinion
13.A. party B. break C. wedding D. incident
14.A. dropped B. delivered C. opened D. presented
15.A. theatre B. church C. office D. station
16.A. folded B. faded C. painted D. divided
17.A. gentle B. patient C. modest D. simple
18.A. reasonable B. temporary C. relative D. impressive
19.A. game B. prize C. glory D. lesson
20.A. casually B. properly C. totally D. shortly
高三英语完形填空中等难度题查看答案及解析
Although it has been revealed in recent years that plants are capable of seeing, hearing and smelling, they are still usually thought of as silent. But now, for the first time, they have been recorded making ultrasonic (超声的) cries when stressed, which researchers say could open up a new field of precision agriculture where farmers listen for water-starved crops.
Itzhak Khait and his colleagues at Tel Aviv University in Israel found that tomato and tobacco plants made cries at frequencies humans cannot hear when stressed by a lack of water or when their stem it cut.
Microphones placed 10 centimetres from the plants picked up sounds in the ultrasonic range of 20 to 100 kilohertz, which the team says insects and some mammals would be capable of hearing and responding to from as far as 5 metres away. A moth may decide against laying eggs on a plant that sounds water-stressed, the researchers suggest. Plants could even hear that other plants are short of water and react accordingly, they speculate (推断).
On average, drought-stressed tomato plants made 35 sounds an hour, while tobacco plants made 11. When plant stems were cut, tomato plants made an average of 25 sounds in the following hour, and tobacco plants 15. Unstressed plants produced fewer than one sound per hour, on average.
It is even possible to distinguish between the sounds to know what the stress is. The researchers trained a machine-learning model to recognize between the plants’ sounds and the wind, rain and other noises of the greenhouse, correctly identifying in most cases whether the stress was caused by dryness or a cut, based on the sound’s intensity and frequency. Water-hungry tobacco appears to make louder sounds than cut tobacco, for example.
Enabling farmers to listen for water-stressed plants could “open a new direction in the field of precision agriculture”, the researchers suggest. They add that such an ability will be increasingly important as climate change exposes more areas to drought.
“The suggestion that the sounds that drought-stressed plants make could be used in precision agriculture seems feasible (可行的) if it is not too costly to set up the recording in a field situation,” says Anne Visscher at the royal Botanic Gardens, Kew, in the UK.
She warns that the results can’t yet be broadened out to other stresses, such as salt or temperature, because these may not lead to sounds. In addition, there have been no experiments to show whether moths or any other animal can hear and respond to the sounds the plants make, so that idea remains based on guesses for now, she says.
1.The experiment by researchers at Tel Aviv University shows that________.
A.tomato plants cry more often than tobacco when hurt
B.plant sounds can be heard by plants quite far away
C.humans can hear water-hungry plants crying
D.moths like laying eggs on stressed plant
2.What is Anne Visscher’s attitude towards the finding of the experiment?
A.Disappointed B.Cautious. C.Appreciative. D.Optimistic.
3.Taking advantage of the new research finding,farmers can________.
A.harvest crops in time B.reduce greenhouse effects
C.diagnose plant condition faster D.detect and remove insects easily
4.Which of the following would be the best title for the passage?
A.Plants get stressed Just Like Us.
B.Sounds of Plants Detected Far Away.
C.Cries of plants break Farmers’Hearts
D.Plants scream in the presence of stress
高三英语阅读选择中等难度题查看答案及解析
When life gives you pineapples—and hundreds of millions of tons of pineapple waste—what do you do? Engineers in Singapore and Vietnam decided to tum all the waste into something useful—the heat barrier for their pineapple juice. Not only does their new material keep drinks cool better than many commercial coolers, but it could also offer a final resting place for the world’s pineapple waste.
To find a use for those leftovers, the researchers mixed pineapple fibers, which they cut up in an electric device, with a sticky agent as a solvent. They then treated the mix with sound waves at frequencies greater than 20 kHz and heated it in an oven at 80℃ for 2 hours. The suspension that formed was then cooled before being freeze-dried.
The result was a pale yellow aerogel (气凝胶) that is lightweight, flexible, and more than 96% porous (多孔的)—qualities that make it an ideal material against both heat and sound.
When the researchers wrapped a sheet of the pineapple aerogel around a military-style canteen bottle, they found that the aerogel could provide three times the heat exchange reduction of commercially available alternatives—they reported this month in Materials Chemistry and Physics. The gel-wrapped bottle kept -3℃ water cooled below 0℃ for 6 hours and liquid heated to 90℃ above 40℃ for 2.5 hours. What’s more, the pineapple gel also acted as a sound barrier; in another test, the gel did a better job of preventing noise from getting in or out than Basmel, a popular kind of sound barrier.
The findings provide a new, eco-friendly approach to recycling agricultural cast-offs—and a good excuse to get a better electric device for your kitchen.
1.Why do engineers come up with the idea of the heat barrier?
A.To lower the cost of heat barriers. B.To make good use of pineapple waste.
C.To find a better cooler for pineapple juice. D.To turn pineapples into something more useful.
2.What is the last step of making the pineapple aerogel?
A.Freeze-drying the suspension. B.Cooling the formed suspension.
C.Cutting up the pineapple leftovers. D.Treating the mix with sound waves.
3.What can we learn about the pineapple aerogel from paragraph 4?
A.It kept the liquid heated to 130℃ for about 2.5 hours.
B.It kept the water cooled below -3℃ for nearly 6 hours.
C.It could be three times as effective as other heat barriers.
D.It did a better job as a sound barrier than as a heat barrier.
4.What is the best title for the text?
A.A Better Way to Keep Drinks Cool. B.An Alternative Way to Recycle Waste.
C.Pineapple Waste, a Wonderful Drink Cooler. D.Pineapples, One of the Most Common Fruits.
高三英语阅读选择中等难度题查看答案及解析
We all have to make decisions all the time, and we have an abundance of choices, ranging from tiny issues to vital ones. Unfortunately, people often find it hard to make decisions. 1. If you would like to improve your skill of decision making, here are four suggestions for you.
Don’t expect to have it all.
2. You can’t order every delicious dish on the menu. And there will be paths not taken, careers not chosen, to name a few. You can imagine some “what if” situations if you must, but do not let them take up too much space in your brain.
3.
It’s often good to think through your decisions. But don’t overdo it. Research can reach a point where returns begin to reduce, which makes it confusing more than clarifying. Many good decisions can be made based as much on intuition (直觉) as on careful assessment of endless data.
Don’t delay making decisions.
Yes, there is a time to put off making a decision. Perhaps you need more information. 4.
Or it’s likely that you wait for a less stressful time. Just don’t wait so long that the decision is made by your own indecisiveness.
Don’t be hard on yourself.
You decide to go on a voyage. You choose an expensive liner. Everything should work out just right. Only you didn’t expect a bug that ran around on the ship, making you and your family sick for five days. 5. But please remember it is unavoidable sometimes.
A. Don’t spend too much time thinking.
B. It is an important source of information.
C. You may regret making such a stupid decision.
D. Don’t count on emotion to make decisions.
E. Maybe you wish to consult with your advisor.
F. Decisions force us to close the door on other possibilities.
G. That means the skill of good decision-making counts a lot.
高三英语七选五中等难度题查看答案及解析
We all have to make decisions all the time, and we have an abundance of choices, ranging from tiny issues to vital ones. Unfortunately, people often find it hard to make decisions. 1. If you would like to improve your skill of decision making, here are four suggestions for you.
Don’t expect to have it all.
2. You can’t order every delicious dish on the menu. And there will be paths not taken, careers not chosen, to name a few. You can imagine some “what if” situations if you must, but do not let them take up too much space in your brain.
3.
It’s often good to think through your decisions. But don’t overdo it. Research can reach a point where returns begin to reduce, which makes it confusing more than clarifying. Many good decisions can be made based as much on intuition (直觉) as on careful assessment of endless data.
Don’t delay making decisions.
Yes, there is a time to put off making a decision. Perhaps you need more information.4. Or it's likely that you wait for a less stressful time. Just don’t wait so long that the decision is made by your own indecisiveness.
Don’t be hard on yourself.
You decide to go on a voyage. You choose an expensive liner. Everything should work out just right. Only you didn’t expect a bug that ran around on the ship, making you and your family sick for five days.5. But please remember it is unavoidable sometimes.
A. Don’t spend too much time thinking.
B. It is an important source of information.
C. Don’t count on emotion to make decisions.
D. Maybe you wish to consult with your advisor.
E. You may regret making such a stupid decision.
F. That means the skill of good decision-making counts a lot.
G. Decisions force us to close the door on other possibilities.
高三英语七选五中等难度题查看答案及解析