Giải đề luyện cuối học kì II Tiếng Anh 7 — 30 câu tuyển chọn

A proposed transport concept This passage describes an imagined long-distance journey using ET3, short for “evacuated tube transport technology”. It is a proposal, not an operating route between New York and Beijing. In the example, travelling by plane and waiting at airports takes at least 20 hours. The proposed capsule journey might take only 2 hours. The design would use a long tube with very little air inside it. Six people could sit in a capsule powered by electricity instead of gasoline. The proposal imagines speeds of about 6,500 kilometres per hour, compared with an example passenger aircraft flying at about 800 kilometres per hour. These are the figures used in the proposal, not measured speeds on an operating ET3 route. Air resistance slows moving vehicles. Removing most of the air from the tube would reduce this resistance. The proposed capsules would also be light. The design would still need extensive development, testing and safety approval before passengers could make such a journey.