【推荐2】阅读下面短文，在空白处填入1个适当的单词或括号内单词的正确形式。

China has launched the CR450 science and technology innovation project     1     (develop)an even faster train. According to the national plan, a more advanced bullet train, with a top operating speed of 400 kilometers per hour and an     2     (experiment)speed of up to 450 km per hour, the CR450 would soon be revealed.

By the end of 2022, China’s transportation network     3     (grow)to cover more than 6 million kilometers. From 2018 to 2022, China’s transportation sector (部门)saw investments ofl7 trillion yuan in fixed assets(固定资产), officials said at     4     news conference.

By the end of 2022, China’s railway network had covered 155, 000 km, of which 42, 000 km were high-speed railways,     5     (account)for more than two-thirds of the world’s high-speed railways. In addition, China has developed the world’s     6     (large)road network, which covers 5. 35 million kilometers, of which 177, 000 km are freeways. China,     7     also has 128, 000 km of inland waterways and 21, 000 berths (泊位), can accommodate industrial production.

Fifty-three cities have city metro transportation systems, with     8     (they)operations covering a total of 9, 584 km. Nearly all administrative villages, towns and counties have access     9     hardened roads and bus services. Post     10    (office)are established in all towns.

【推荐1】阅读下面短文，在空白处填入1个适当的单词或括号内单词的正确形式。

July 2023 was the world’s warmest month on record, with heat waves spreading across North America, Asia and Europe. How to cool the planet     1    (trouble) scientists in the last decades. They are now turning     2     sun-blocking technology, which refers to reflecting sunlight back into space to keep down the temperature of the     3    (planet) climate.

According to Euro news, a European television news network, one idea     4    (involve) pumping sun-blocking particles (粒子) into the upper atmosphere. The particles will then stay in the air and redirect sunshine back upwards. It is like     5    (apply) sunscreen on the outside of Earth. Another very     6    (promise) technique is called “cloud brightening”. This method includes sending sea salt particles into clouds above the sea, making     7    (they) whiter and thus reflect more sunlight back into space.

However, following the report,     8     open letter by more than 60 scientists called for caution and more research first. Kristen Rasmussen, a climate scientist at Colorado State University, US, has been studying     9     these sun-blocking methods will affect rainfall patterns. She said that apart from rainfall, ecosystems and even human     10    (community) will also be affected. “We need to be very cautious on this,” Rasmussen told Scientific American.

【推荐3】Directions: After reading the passages below, fill in the blanks to make the passages coherent and grammatically correct For the blanks with a given word, fill in each blank with the proper farm of the given word; far the other blanks, use one word that best fits each blank.

When Steve Birkinshaw, the British fell running (越野路跑)champion, planned his record- breaking route across the 214 peaks of the Lake District, it took him six months of preparation and all his years of experience to figure out       1    he thought was the perfect path.

Now two physics students from the University of Manchester who had never visited the mountains have produced a     2    (short) route using a computer algorithm.

Mr Birkinshaw, 52, a researcher at Newcastle University who lives in the Lake District, has had an admirable fell running career, including breaking the 72-year-old record set by Joss Naylor     3    climbing the 214 peaks in the Lake District in only six days and 13 hours in 2014. His record was beaten by seven hours in 2019 by Paul Tierney, who followed Birkinshaw’s carefully mapped route over 512km and 36,000m of climbing.

Mr Birkinshaw, who advised the students, thought     4     would be impossible to improve the route with a computer, ” but they     5     (prove) me wrong“, he said.

“The problem is you change one thing in the route and it’s a domino effect and everything else changes. I would have to spend two to three hours a week for six months     6     (redraw) the route on a computer to work out how long a slight adjustment would change the time     7     now they have the algorithms they can put in all the peaks and find out instantly?”

To figure out their route, the pair used satellite imaging data of the area, with     8     complex data functions were coupled to describe how fest people can move along different routes. This allowed them to work out the energy costs of moving between each peak.

They     9    (feed) all that information into an off-the-shelf solver for the travelling salesman problem, a classic computational science problem for finding out the fastest delivery routes along road networks. Their achievement opens up possibilities to update running records and     10    one day help to deliver aid in badly mapped areas of the world.