Task1. Listen to the audio clip to complete the passage with proper expressions.
Electricity makes a long journey before itgets into your home, but it's not tired. It's ready to go to work. Behind that___________1_____________, there's a lot going on to bring you the safe, reliable, ___________2_____________, and environmentally _____________3___________you depend on every day. Let's start at the beginning power generating for facilities fueled by coal, nuclear energy, natural gas, and___________4_____________, such as the wind and sun, great electricity we canuse. When it leaves the ___________5_____________, electricity first travels across a network of _____________6___________. These lines are the backbone ofthe ____________7____________ capable of carrying large amounts of electricity across long distances. After completing the first leg of its journey, electricity arrives at a neighborhood substation. Substations job is to____________8____________ so that the power can be used in homes. The electricity is now ready for the final leg of its voyage. When it leaves the substation, power travels along the ____________9____________. You see everyday around your community. This process is repeated in cities and towns acrossour service territory, and now the electricity has finally reached its_____________10___________, your home.
Task2. Watch the video clip to complete the passage with proper expressions.
We all rely on energy to light our livesand power our worlds. But how that energy is generated and delivered is changing fast. One way that it's happening is through microgrid. The______________1________________ is a big, interconnected network that takes energy from large, far away _____________2_________________, and transmits it over long distances to consumers as technologies and policies continue to_______________3_______________. Communities and businesses can choose to supply their own energy locally. By building their own microgrid. A microgrid is a group of ______________4________________ and distributed energy resources. These are energy systems that can include solar panels, batteries,________________5______________, and combined heat and power plants. This means that energy is generated closer to where it's needed. The microgrid, which can be connected to the larger ______________6________________, can function, supplement, or operate independently, providing a secure ________________7______________when there's an _____________8_________________. These distributed energy resources are all great ways to generate clean, renewable energy. Homes, businesses, and buildings can become more energy independent, tapping into aflexible and reliable energy supply that reduces greenhouse gas emissions andlowers ________________9______________. And because microgrid are so efficient, they also save on energy costs. As energy becomes ever more critical in ourdaily lives, microgrid will enable us to shift from central power generation, the local, flexible, reliable forms of sustainable power and______________10________________. So, when disaster strikes, we'll still haveall the energy we need to power through life.
Task3. Listen to the audio clip to choose correct answers to the questions.
1. A. Using low-voltage transmission technology
B. Implementing Ultra-High Voltage (UHV) technology
C. Relying on imported electricity
D. Mainly using coal-fired power generation
2. A. ±800 kV line
B. ±1000 kV line
C. ±1100 kVChangji-Guquan UHVDC line
D. ±1200 kV line
3. A. China Telecom and China Unicom
B. State Grid Corporation of China (SGCC)and China Southern Power Grid (CSG)
C. China National Petroleum and China Petro chemical
D. China Mobile and China Unicom
4. A. Basic mechanical control
B. Advanced automation and control technologies
C. Manual operation by humans
D. Radio wave control
5. A. Improving the construction quality of substations
B. Real-time monitoring and management of power flows
C. Increasing physical security of substations
D. Providing wireless internet services
6. A. Providing cheap electricity exports
B. Advancing global power engineering and sustainable development
C. Monopolizing the global power market
D. Reducing global electricity demand
Task4. Watch the video clip to choose correct answers to the questions.
1. A. Thermal conduction
B. Electromagnetic induction
C. Chemical reaction
D. Mechanical rotation
2. A. Aluminum
B. Copper
C. Ferromagnetic material
D. Plastic
3. A. In a star configuration
B. In a Delta configuration
C. In a parallel configuration
D. In a series configuration
4. A. To increase magnetic flux
B. To reduce energy loss due to eddy current formation
C. To improve electrical conductivity
D. To enhance thermal insulation
5. A. By using a cooling fan
B. By immersing the transformer in coolingoil
C. By using a water-cooling system
D. By natural air convection
Task5. Watch the video clip and take notes to complete the summary.
High tension power lines form the essential backbone of our modern life, delivering electricity across vast landscapes. Often noticed for their intentional sag, these lines are designed with meticulous engineering to handle fluctuations in ________1_________ and weather. The sag is not a flaw but a ________2_________, allowing the lines to expand and _________3________ safely with temperature changes, preventing them from snapping under ________4_________.
Engineers consider the full range of _________5________, from the hottest to the coldest days, to ensure the power lines function year-round. They adjust the tension accordingly, using precise calculations to keep the lines at _________6________ and within safe operating limits. Wind also plays a significant role, causing the lines to _________7________ in a delicate dance that requires sophisticated software to analyze and predict potential stresses and issues.
Regular _________8________ are vital, asthey identify signs of wear and tear and ensure the stability of the structures, which must be firmly _________9________ to withstand environmental stresses. The intentional sag, temperature calculations, and considerations for wind demonstrate the complexity and ingenuity behind our power ________10_________.Understanding these principles not only helps us appreciate the engineering marvel but also underscores the importance of continued innovation in this critical field.
Task6. Listen to the audio clips to write down each sentence.
1.______________________________________________________________________
2.______________________________________________________________________
3.______________________________________________________________________
4. ______________________________________________________________________
5. ______________________________________________________________________
Task7. Watch the video clip to discuss questions critically.
1. How does Gansu's geographic and natural advantage in solar and wind energy contribute to its role as a major provider in China's west-to-east power transmission project? Discuss the significance of developing new energy sources in the context of China's energy strategy and environmental goals.
2. The video mentions that the electricity generated by renewable energy in Gansu exceeded 40 billion kilowatt hours in2021, benefiting more than 20 other provinces and cities. How does this scale of energy production and distribution impact the economic development of both Gansu and the receiving regions? Consider the aspects of job creation, investment attraction, and energy security.
