Вопрос № 1077750 - Английский язык

Прочитайте текст
The properties of a metal can be further improved by use of heat treatment. Heat treatment is the term given to number of different procedures in which the properties of metals and alloys are changed. It usually consists of heating the metal or alloy to a selected temperature below its melting point and then cooling it at a certain rate to obtain those properties which are required. For example, hardening is used to make metals harder. Tempering makes them softer and less brittle. Annealing is carried out to make a metal soft so that it can be machined more easily. In this way, metallic materials can be produced to meet every kind of engineering specification and requirement.
Ответьте на вопрос
What makes metals softer and less brittle?

Прочитайте текст и определите, какой из заголовков соответствует тексту
All engineering materials are divided into metals and  non-metals. Copper, cast iron, aluminium are examples of metals. Rubber, plastic and ceramics are examples of non-metals. Today different metals are widely used in machine-building industry.

A pipe that carries water or waste liquids away is called …

A diagram, picture or technical drawing of an object that shows the relationship or order of assembly of various parts is called …

A diagram usually to scale, showing a view from above of the relationships between rooms, spaces and other physical features at one level of a structure is called a …

When contractors need drainage system they make a ______ (long narrow hole dug into the surface of the ground).