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Вопрос № 237346 - Английский язык

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What did the introduction of grooves in the concrete field help to improve?
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  • The grooves ran perpendicular to the direction of the landing aircraft.
  • The grooves served to draw off excess water in rainy conditions.
  • The grooves helped to extend runways.
  • This arrangement permitted expansion of the facilities.
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Вопрос задал(а): Анонимный пользователь, 10 Ноябрь 2020 в 00:25
На вопрос ответил(а): Анастасия Степанова, 10 Ноябрь 2020 в 00:25

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Вопрос № 628417

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What did the introduction of grooves in the concrete field help to improve?
This arrangement permitted expansion of the facilities.
The grooves had the slope-line approach system.
The grooves helped to extend runways.
The grooves served to draw off excess water in rainy conditions.

Вопрос № 284340

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The quality of concrete is known to depend on the properties of materials it consists of. The amount of constructing materials is also of great importance. Among the kinds of concrete used in modern construction there are plain concrete and reinforced, or ferro-concrete. The usage of plain concrete is practically limitless. As to ferro-concrete, it is mostly used for construction of foundations, columns, girders and beams. This kind of concrete is also rather popular for constructing bridges, dams and dock walls.
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The usage of what construction material is practically limitless?
The usage of reinforced concrete is practically limitless.
The usage of gravel concrete is practically limitless.
The usage of asphalt concrete is practically limitless.
The usage of plain concrete is practically limitless.

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Вопрос № 237347

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Why is the An-225 of great use for international relief organizations?
It is a strategic airlifter and the world’s largest airplane.
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It can be used during disaster relief operations.
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Вопрос № 237348

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What category of materials does carbon fiber belong to?
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It comes into the category of Kevlar.
It belongs to metal frames.
It is one of composite materials.

Вопрос № 237349

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Why was the Hughes H-1 Racer technologically important?
Flying this aircraft Howard Hughes set a transcontinental airspeed record.
The average speed of this aircraft was 518 km/h.
It was designed and built by Howard Hughes.
The Hughes H-1 Racer had a number of design innovations.

Вопрос № 237350

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What provides a very big passenger volume on the A 380?
Advanced composite materials which are used in the parts of the A 380.
Smoothly contoured cross-section of the wings of the A 380.
The latest advances in structures and materials used in the A 380.
A double-deck design of the A 380 with the upper deck extending along the entire length of the fuselage.
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