Heavily loaded passenger jets need long runways to gather enough speed to leave the ground. Runways at some large airports are longer than 3 000m(10 000 ft).
At night, bright lights line the runways so that pilots can find them without trouble. A system of flashing guide lights is set up beyond the runway to help pilots land safely.
Control Towers
People who work in control towers are called air traffic controllers. They direct the movements of all planes on the ground and in the air by keeping track of them on large radar screens. Air traffic controllers tell a pilot, by radio, when and where to taxi or pilot the plane down the runway.
Electronic equipment is used to guide airplanes. Long range radar is used to keep track of planes far away from the airport. This radar is called Ground Control Approach (GCA).When the airplane gets within a few miles of the runway, the air traffic controller begins to use Precision Approach Radar (PAR).This allows the controller to guide the airplane to within 0.4km(0.25mi)of the runway. At that point, the pilot completes the landing. Another electronic aid used in bad weather is the Instrument Landing System (ILS).In this system, radio transmitters located near the runway send guidance signals to the airplane. These signals tell the pilot how to steer the plane for the final approach to the runways. Today, there are also electronic "microwave" landing systems (MLS) that can land the plane fully automatically.
Terminal Buildings
Terminal buildings vary in size and shape. Most of them are quite large. More than 228 million people fly on the airlines in America every year. Every passenger must pass through terminals. Long, covered walkways lead from the center of some terminals to the gates where airplanes are boarded. At some airports, buses are used to transport passengers to their airplanes. Passengers arriving from another country must pass through customs and passport control. Customs officials check the incoming baggage for taxable items. They also check passengers to be sure no forbidden items are brought into the country. Passport officials check the passports of passengers for personal identification.
Passengers are not allowed to bring guns, knives, or other weapons onto a passenger airplane. Before boarding, they must walk through a detector which triggers a special signal if they are carrying anything made of metal. Luggage is also examined for weapons. This is done to ensure the safety of the passengers.
1. The main purpose of this passage is to introduce the history of airplanes.
2. The device of an automatic pilot can usually fly a plane more smoothly than a human pilot.
3. With the help of the radio equipment, pilots are able to communicate with ground controllers.
4. We can tell from the passage that early airplanes are not as solid as modern ones.
5. According to the passage, the busiest airport in the world is in Grapevine, Texas, midway between the cities of Dallas and Fort Worth.
6. The runways should be long and solid enough for the heavily loaded jets.
7. Precision Approach Radar (PAR) is used by air traffic controllers to keep track of airplanes far away from the airport.
8. The planes can be landed fully automatically if the control towers are equipped with .
9. After getting off the plane, every passenger arriving from another country must pass through .
10. When passengers go through a detector before they board, and anything made of metal is detected, the detector triggers .
Part ⅡReading Comprehension (Skimming and Scanning)
本文主要介紹了飛機(jī)的相關(guān)知識,包括飛機(jī)內(nèi)部的一些重要儀器及它們的功能,飛機(jī)的制造和發(fā)展,指出了現(xiàn)代飛機(jī)與早期飛機(jī)的不同之處及相關(guān)問題;介紹了飛機(jī)場的規(guī)模和功用,飛機(jī)跑道、機(jī)場控制塔、機(jī)場大樓等的工作原理及作用等。
1. N)[精析]本文介紹了飛機(jī)、飛機(jī)場等有關(guān)設(shè)施的特點(diǎn),并沒有介紹飛機(jī)的發(fā)展史。
2. NG)[定位]由題干關(guān)鍵詞an automatic pilot定位到第1個(gè)標(biāo)題下的第二段第一句話。
[精析]原文指出自動(dòng)駕駛儀無需駕駛員按任何按鈕便可駕駛飛機(jī),甚至可以自動(dòng)起飛和降落。但并未提及它駕駛飛機(jī)比駕駛員強(qiáng)。
3. Y)[定位]由題干關(guān)鍵詞the radio equipment定位到第1個(gè)小標(biāo)題下第二段末句,"The radio equipment allows...to receive navigation signals."
[精析]該句意為"無線設(shè)備使駕駛員能夠與地面控制人員談話,接收導(dǎo)航信號",是題干的同義轉(zhuǎn)述。
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