Установите соответствие между отрывками из текста A-F и заголовками 1-7. Используйте каждую цифру один раз. В задании один заголовок лишний.

• Объекты 1
  • 1. A source of constant danger in the road.
  • 2. The necessity of sound engineering techniques.
  • 3. The importance of the subsoil beneath a road.
  • 4. The results of studies about the serious accidents.
  • 5. The main components of transportation.
  • 6. The classification of modern roads.
  • 7. The principal features of any modern road.
• Объекты 2
  • D. Vehicle. This component also plays a vital part in determining safety on roads. An unsafe vehicle is a source of constant danger in a road transportation system.
  • F. Road. To ensure maximum safety for the transportation system, it is necessary to plan and design highways on sound engineering techniques.
  • B. Road construction. In modern road construction, there is much greater recognition of the importance of the subsoil beneath a road. It is regarded as an integral part of the road. In case of mechanical stabilization granular or cohesive materials are added to the subsoil. In dry climates it is necessary to add substances helping to retain sufficient moisture.
  • E. Driver. Studies have shown that 86% of the serious accidents are caused by drivers.
  • C. Transportation is a system consisting essentially of three components: driver, vehicle, and road. If any one of these components fails, the whole system would fail, and conditions of hazards would be created on the road.
  • The passage is missed.
  • A. Modern roads. Modern roads should possess the following principal features. They should be designed according to the anticipated volume and speed of the traffic. Bends and gradients should always be slight. Visibility should not be hindered. Hedge and tree planting on the road sides should provide a pleasant and interesting outlook to avoid monotony and boredom.