سوال ۱۷ کنکور ارشد مهندسی مکانیک ۱۴۰۴

PART C: Reading Comprehension — Read the following passage and answer the question by choosing the best choice (1), (2), (3), or (4).

PASSAGE 2 — paragraph 1

The main trends in metallic materials are closely connected with the economic pressure on improvement in the performance of machines, appliances or vehicles. It does very often mean the clever use of recently developed materials, new to a particular application or sometimes completely new ones. These are powerful forces encouraging the substitution of materials and driving the development of new or upgraded materials. An increasing number of designers are looking for engineered materials with enhanced characteristics for a particular application.

According to paragraph 1, «..........» .