19/04/2025 14:44 pm
|
Đề thi thử vào lớp 10 THPT Chuyên ĐHSP Hà Nội 2025 - môn Anh (lần 2) The Belgian de Groof worked for years on an apparatus intended to emulate the flight of birds. For this purpose, he constructed a device with bat-like wings. The framework was made of wood and rattan; the huge wings were covered with strong, waterproof silk, as was the long tail. The machine was controlled by levers. De Groof's first trial, which consisted of jumping from a great height to the Grand Place in Brussels, ended in failure, and he was lucky to escape unhurt. His second attempt was successful, but his third, on 9 July 1894, was not. Having planned to descend into the River Thames, de Groof was taken up by balloon and then released from a height of 1,000 feet. For some unknown reason the wing frame collapsed and he fell to his death. There was almost a second accident when the balloonist, having lost control of the balloon, landed in front of an approaching train, which just managed to stop in time.
Theo TTHN 2K12! KHOÁ HỌC LỚP 9 & ÔN THI VÀO LỚP 10 TRÊN TUYENSINH247 Học phí TIẾT KIỆM chỉ 5K/NGÀY. Xem ngay: TẠI ĐÂY |