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But scientists in India studied audio (声音的) recordings of birds in the rainforest. They said they didn't find proof to support this idea about sound traveling better. It was one of the ideas about environmental factors. Another idea is that birds sing at dawn because it's too dark to look for food.

"We didn't find much support for some of these environmental reasons suggested in past studies for birds singing more at dawn," said Vijay Ramesh, a researcher at Cornell University.

The researchers didn't find one clear reason why the dawn chorus happens, but they found some support for the ideas that the early morning noise is about birds marking their territory after being inactive at night and talking about finding food.

The team analyzed recordings from audio recorders placed at 43 locations in the Western Ghats mountain range in southern India, which is known as a biodiversity hotspot. They examined sounds of what they determined were 69 different species of birds. They studied recordings from the hours around dawn and the hours around dusk to compare activities.

Unsurprisingly to anyone who's been roused by bird calls, the vast majority of species they studied had significantly higher vocal activities at dawn compared to dusk.

After graduating in 2017 and stepping into the highly competitive online clothing industry, Ren realized he needed to find a specialized market. His solution: custom wooden plaques. He founded a company in 2022. "Each piece is tailor-made. It's nearly impossible to find the same product on the market," Ren explained. "The price per order attracts quality customers who place large orders."

Last year, his craft earned him over $688,000 — a success he owed to his much attention to detail and commitment to perfection. "We work with over 10 different types of wood. Every step, from design and cutting to carving, coloring and painting, is crucial," he said.

International orders began with a midnight message from an American client two years ago. After producing five design variants, Ren waited by his screen for hours without receiving any feedback. "I later realized it was simply the time difference," he recalled.

Another memorable project was for an American restaurant owner who initially requested four window-like plaques, each about 1.2 meters in diameter. After presenting several design drafts that showcased traditional techniques and craftsmanship, the impressed client increased the order to six pieces. "The owner went on to refer several other American customers to me," said Ren.

He believes that in the custom business, long-term relationships are key — each satisfied customer becomes a brand ambassador. Ren's small but dedicated (专心致志的) team of eight continues to breathe life into wood, with his plaques now decorating numerous businesses abroad.

Playing Guess Who

Learning who is who from history can get confusing so use this teaching strategy to help. Put those problem- solving skills to good use in history class (or others). Describe a time, place, or person from history with only three clues. The entire class has to try to figure out who or what you are referring to, then race to the whiteboard to write the answer.

Writing a Journal

Develop creative writing skills by asking each student to write a journal from someone else's viewpoint. There are many famous diarists who provide key insight into life through history. You could ask students to give a different diary and then ask them to read it in front of the class.

Brainstorming

Group brainstorming sessions are a great way to bring your students together to connect with whatever they are learning. Instead of thinking about the topic alone at their desk, they get to expand (详述) their ideas with other students in small groups. Use brainstorming worksheets for this activity idea.

Debating

Most students will have a view of what they're learning. Use this to your advantage and create a school activity of debating the pros or cons of whatever they are learning about. Get them to write down their main points on pieces of paper ahead so they can practice and be prepared for the debate. This can be done in front of the whole class and you can change the debaters each week.

1.写信目的；

2.简介摊位；

3.你的期待。

注意：

1.写作词数为100左右；

2.请按如下格式在答题卡的相应位置作答。

Dear Students' Union.

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As an old saying goes, "Friends are like wine, the older, the better." This has led many to attach (great) significance to long-standing friendships than to newly (form) ones. For example, when two pieces of advice (give) to solve a problem — one from a new friend and the other from an old friend — the majority will prefer latter, even if the new friend's advice is objectively better. Nevertheless, I disagree with the old saying, (believe) that new friends are not necessarily worse than old friends. It is not always right to determine your friendship by the (long) of time.

Once you call someone a friend, it is because they are a person who is reliable andinterests are in common with yours. It is mainly their character and interests make them your friends. While people's appearances may change, the essence of their character usually (stay) the same. Therefore, in this regard, there is no differenceold friends and new friends.