Unit 12 Listening Quiz

The sentence is discussing the topic of extreme engineering and mentions that one of the most amazing and astonishing ideas is a rail tunnel under the Atlantic Ocean. The correct answer fills in the blanks with "recently," "about," and "of the most under," which fits grammatically and makes sense in the context of the sentence.

The presenter is confirming their understanding that the train which would run through the tunnel is a magnetically levitated train. They are asking if their understanding is correct.

Maglev trains are a type of train that does not use rails, allowing them to reach high speeds. Unlike ordinary trains, they operate without making any noise, making the ride more comfortable and quiet. Additionally, since they don't use traditional fuel combustion engines, they produce no pollution. Therefore, the statement suggests that Maglev trains can reach high speeds, don't use rails, are fast, comfortable, and quiet.

Maglev trains produce less pollution than ordinary trains. This is because maglev trains are powered by electricity and do not rely on fossil fuels like diesel or gasoline. As a result, they do not produce any direct emissions such as carbon dioxide or air pollutants. Additionally, maglev trains do not have traditional wheels that create friction with the tracks, reducing noise pollution as well. Therefore, it can be concluded that maglev trains are indeed less polluting compared to ordinary trains.

The correct answer is "The Science Show" because in the conversation, the question asks for the name of the program and "The Science Show" is one of the options provided.

Maglev trains differ from normal trains because they do not have wheels. Instead, they use magnetic levitation technology to float above the tracks, eliminating the need for wheels. This allows for a smoother and faster ride, as there is no friction between the train and the tracks. The absence of wheels also reduces maintenance and wear and tear on the tracks, making maglev trains more efficient and cost-effective in the long run.

The first Maglev train started being used in China.

The correct answer is a trans-Atlantic tunnel. The conversation discusses different kinds of technology, and one of them is a trans-Atlantic tunnel. This implies that the conversation is about various technological advancements, and specifically focuses on the concept of a tunnel connecting two continents.

Maglev trains are known for their high construction costs. The technology used in Maglev trains, which involves magnetic levitation and propulsion, requires specialized infrastructure and materials. The construction of the tracks and the necessary electromagnets can be extremely expensive. Additionally, the maintenance and operation costs of Maglev trains are also high. Therefore, the high cost of building and maintaining Maglev trains can be a potential problem associated with their use.

Maglev trains currently travel at a speed of 500 kilometers per hour.

The correct answer is "The pre-constructed sections will be made on land." This means that the sections of the rail tunnel will be manufactured or built on land before being assembled or put together. This implies that the construction process will involve creating the sections in a controlled environment, potentially allowing for better quality control and efficiency.

The given statement is false because the passage does not mention anything about a train running through the tunnel. It only provides information about giant anchors holding the tunnel in place, the tunnel floating 200 meters under the surface, and the tunnel being built from pre-constructed sections. Therefore, the correct answer is that a train that travels on tracks will not run through the tunnel.

The conversation discusses the potential dangers to underwater Maglev trains, and it mentions submarines, icebergs, and ocean waves as possible risks. However, a power outage is not mentioned as a danger to these trains. Therefore, the correct answer is a power outage.