1 . Google Flights reveals new feature to help travelers save money

Regular users of Google Flights might notice a new feature the next time they go to the site to check out airline schedules and compare flight prices.

The new feature officially announced on Monday morning in a news release is Google guidance on the cheapest time to book a flight, which adds price tracking alerts and a price guarantee option already in place.

Cheapest time to book: Google Flights said starting this week, searches that have reliable trend data will let users see in what time frame prices have typically been lowest. Users can then better decide whether to book now or later, Google said in the release.

Take flights from New York to Miami, for example, the cheapest time to book is usually from Sep 13 to Dec 7. Prices during this time are $59 cheaper on average.

Price tracking: Users who want to wait for lower fares before booking can use a price tracking feature that “can do most of the heavy lifting for you,” Google said.

Price guarantee: On some flight results, users might notice a price guarantee badge (标志) pop up (this won’t happen on every use). If you book one of these flights, Google said it will monitor the price every day before takeoff.

“If the price does go down, we’ll pay you back the difference via Google Pay. These price guarantees are part of a pilot program available for select Book on Google itineraries (行程) departing from the U. S.,” Google said in the release.

2 . The Nobel Prize in Chemistry 2023 was awarded to three American scientists Moungi G. Bawendi, Louis E. Brus and Alexei I. Ekimov “for the discovery and development of quantum (量子) dots”. They are so tiny that their size determines their properties. These smallest components of nano (纳米) technology now spread their light from televisions and LED lamps, and can also guide surgeons when they remove cancer tissue, among many other things.

Everyone who studies chemistry learns that an element’s properties are governed by how many electrons (电子) it has. However, when matter contracts to nano-dimensions quantum phenomena arise; these are governed by the size of the matter. The Nobel winners in Chemistry 2023 have succeeded in producing particles so small that their properties are determined by quantum phenomena. The particles, which are generally known as quantum dots by scientists, are now of great importance in nanotechnology.

“Quantum dots have many fascinating and unusual properties. Importantly, they have different colours depending on their size,” says Johan Åqvist, Chai r of the Nobel Committee for Chemistry.

Physicists had long known that in theory size-dependent quantum effects could arise in nanoparticles, but at that time it was almost impossible to sculpture in nanodimensions. Therefore, few people believed that this knowledge would be put to practical use.

However, in the early 1980s, Alexei Ekimov succeeded in creating size-dependent quantum effects in coloured glass. The colour came from nanoparticles of copper chloride (氯化铜) and Ekimov demonstrated that the particle size affected the colour of the glass via quantum effects. A few years later, Louis Brus was the first scientist in the world to prove size-dependent quantum effects in particles floating freely in a liquid. In 1993, Moungi Bawendi revolutionised the chemical production of quantum dots, resulting in almost perfect particles. This high quality was necessary for them to be used in applications.

Quantum dots are thus bringing the greatest benefit to humankind. Researchers believe that in the future they could contribute to flexible electronics, tiny sensors, thinner solar cells and quantum communication — so we have just started exploring the potential of these tiny particles.

3 . In the late 19th century, there was a poor farmer in Scotland named Fleming. He was ________ and always ready to help others. One day when he was ________ in the field, he suddenly heard a cry for help in the wetland nearby. It ________ that a boy was trapped in the wetland. Seeing the mud up to his ________, Fleming immediately jumped into the wetland and ________ to save the boy. The next day, a brand-new ________ from a distant place stopped at the farmer’s door. An elegant gentleman got off the carriage and ________himself as the boy’s father. The gentleman brought the farmer many precious gifts ________saving his son, but the farmer refused. He ________ that saving others was what he should do. It ________ that the gentleman saw the farmer’s son playing in a dirty suit. He thought about it and said to the ________, “In this case, I have a ________. You saved my son’s life and I want him to ________ the best education in Britain.”The farmer agreed ________. Later, the farmer’s son graduated from St. Mary’s Medical School in England and became the ________ Sir Fleming Alexander. He is the inventor of penicillin (青霉素), which has saved ________ lives. Years later, the gentleman’s son caught pneumonia. What saved his life? Penicillin. Who was the gentleman’s son? Churchill, the prime minister of Britain during World War II.

This story tells us that the simple and kind Scottish farmer’s ________ in saving others without ________ any return, brought his own child a good opportunity. And because of his child’s achievement, he ________ the gentleman’s child, who became British prime minister of World War II. The kindness of an ordinary farmer ________ changed the whole world.

4 . Here are some ways to introduce classical music to your children.

●When you read a story to your children, pick out a classical music piece that matches the emotion of the book.     1     After getting used to reading in time with the music, tell your children you have a special surprise for them. Read them the story in the new way, and they will surely be delighted!

●If your kids are always moving around, try introducing classical music to them by dancing. Instruct your children to listen to the music and dance however the music makes them feel. Parents dance with them!     2    

●Before your kids begin playtime, make a list of classical music pieces with the name of the person who wrote it.     3     Tell them something about the person they picked to listen to. Before long, your children will have a basic knowledge of the person who wrote the piece.

●    4     Make sure your children listen to the music and create their picture to however the music makes them feel. Once everyone is finished, listen to the music again and explain your creations.

●You can pick out three pieces of music to play during the week.     5     At the end of the week have a listening game to see who can remember the name of the piece when you play it. Games are always a fun way to introduce learning concepts.

Chinese drinking vessels (器皿) have kept evolving throughout the dynasties of China,     1     reflect the ceremony system,     2     (culture) ideas, customs and manners at that time.

In Xia, Shang and Zhou dynasties, ancient China established itself a complete ceremony system.     3     (drive) by the system, it’s widely believed that it’s impolite to serve     4     alcohol, which helped greatly promote the     5     (popular) and use of bronze (青铜) drinking vessels,     6     (make) them a significant symbol of bronze culture in this period. The drinking vessels came with a variety of shapes and sizes.

Drinking wine was     7     (extreme) popular in the Tang Dynasty. Among more than 40,000 poems included in the Complete Tang Poems, there are up     8     5,400 poems written about wine. The drinking vessels mentioned in Tang poetry are rich in material, including metal vessels as well as ceramic (陶瓷) vessels, which boomed in the Song Dynasty.

Jingdezhen ceramics in Jiangxi Province     9     (last) for five or six hundred years throughout the Ming and Qing dynasties, where a surprisingly large number and a wide variety of wine sets were created. Ceramic wine sets reached the peak of perfection in the Qing Dynasty, which     10     (represent) by the set of wine cups with flowers of the twelve months from the Kangxi period of the Qing Dynasty.