【正文】 e aircraft. Loading the aircraft so the gross weight is less than the maximum allowable is not enough. This weight must be distributed to keep the center of gravity (CG) within the limits specified in the POH or AFM. If the CG is too far forward, a heavy passenger can be moved to one of the rear seats or baggage can be shifted to a rear partment. If the CG is too far aft, passenger weight or baggage can be shifted forward. The fuel load should be balanced laterally: the pilot should pay special attention to the POH or AFM regarding the operation of the fuel system, in order to keep the aircraft balanced in flight. Weight and balance of a helicopter is far more critical than for an airplane. With some helicopters, they may be properly loaded for takeoff, but near the end of a long flight when the fuel tanks are almost empty, the CG may have shifted enough for the helicopter to be out of balance laterally or longitudinally. Before making any long flight, the CG with the fuel available for landing must be checked to ensure it will be within the allowable range. Changes of fixed equipment may have a major effect upon the weight of the aircraft. The replacement of older, heavy electronic equipment with newer, lighter types results in a weight reduction, which will probably cause the CG to shift and must be puted and annotated in the weight and balance record. Repairs and alteration are the major sources of weight changes. The Aamp。文章長度180230詞。3. 民航局頒發(fā)的適航證應當規(guī)定該民用航空器所適用的活動類別和證書的有效期限。COMAC航空科技英語等級考試B1（技術類）樣題Test Time：120 minutes部門_______________ 姓名____________ 工號____________Part I Listening （30%）Section 1 Conversation and Lecture（10%）Directions: In this section, you will hear a long conversation and a lecture. At the end of the conversation or the lecture, you will hear five questions. The conversation, the lecture and the questions will be spoken ONLY ONCE. After you hear a question, you must choose the best answer from the four choices.Conversation 1. A) They get you directly to holiday destination.B) Their tickets can be bought on the internet.C) They offer excellent services to customers.D) They’re much cheaper than famous airlines.2. A) They have sprung up recently and bee successful.B) They change prices on the basis of customers’ demand.C) They always offer travelers the extremely cheap flight.D) They do much advertising but few people ever watch it. 3. A) By travelling before public holidays.B) By buying tickets a day in advance.C) By booking at the very last minute.D) By flying at peak time like Fridays.4. A) They try every possible means to reduce expenses.B) They charge different prices depending on demand.C) They don’t serve any food on any of their flights.D) They have increased the speed of their aero planes. 5. A) They only offer cheap tickets online.B) They fail to offer satisfactory service.C) They spend little time on the ground.D) They fly to and from smaller airports.Lecture 6. A) The 845m2 wing area is large enough to park 70 cars.B) The plane has the potential to carry 550 passengers.C) The tail is about as long as the Great Sphinx in Egypt. D) The two deck fuselage is as high as a 7storey building.7. A) It is as economical to run as a mon jet.B) It burns more fuel than other jumbo jets.C) It can fly an amazing 15,000 km nonstop. D) It can carry more fuel than other planes.8. A) Toulouse in France.B) England and Wales. C) All over the Europe.D) Spain and Germany.9. A) It is remarkably expensive.B) It is impressively efficient.C) It is a nationwide project.D) It is extremely plicated.) The expenses.B) The designing.C) The electronics.D) The cooperation.Section 2 Compound Dictation （10%）Directions: In this section, you will hear a passage TWICE. You have its script in the following, but with eleven blanks in it. You are required to fill in the first eight blanks with the exact words you have just heard. For last three blanks, you can either use the exact words you have just heard or write down the main points in your own words. Remember, there will be a pause for the last three blanks. Laurence Barron, President of Airbus China, defended the A380 superjumbo jet as its safety performance has been called into question.“The Qantas A380 suffered an (1) ______________ engine failure, a fairly rare event, which also damaged the aircraft itself. The aircraft performed as expected and (2) ______________ safely, so no, there is nothing wrong with the A380. It’s a (3) ______________ aircraft.”Barron also says the engine issue will not (4) ______________ next summer’s scheduled delivery of the A380 to China Southern Airlines, the only (5) ______________ carrier to purchase the plane.Meanwhile, Barron explains that the lack of orders for its A350 aircraft, which is under development, from Chinese carriers is due to the country’s (6) ______________ planning structure.“The Chinese government, as you are well aware, works on a 5yearplan basis, and they are about to (7) ______________ the 12th 5yearplan which runs from 2011 to 2015. The A350 deliveries that we can offer are now in the what will bee the 13th 5yearplan period.”Eric Chen, Airbus China‘s Vice President, adds that the Chinese carriers’ timid (8) _____________ to the A350 is due to its peting product, Boeing’s 787. “Several years ago, Chinese airlines ordered more than 60 Boeing 787’s and for various re