سه کلید برق بیرون یک اتاق قرار دارند. داخل اتاق یک لامپ وجود دارد. درِ اتاق بسته است و فقط یک بار اجازه داری وارد اتاق شوی. چطور می‌توانی بفهمی هر کلید مربوط به لامپ است؟ (بدون اینکه از کسی کمک بگیری و فقط یک بار وارد اتاق شوی)
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For the last 12 years , they.........their son in Scotland every year. A- visit B- have visited C- are visiting D- had visited
When wood, natural gas, oil, or any other fuel burns, ……… with oxygen in air to produce heat.
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In spite of its scientific method, neoclassical economics had strong ideological implication. The theoretical model assumed the existence of a structure of economic institutions based on i ...
……… is rooted in experiments in iron and steel conducted in the nineteenth century.
………, Luxor did not reach preeminence until about 2,000 B.C.
کدام بیت فاقد غلط املایی است؟
کدام عبارت با مفهوم بیت زیر، تناسب دارد؟ «غمی کز پیش شادمانی بري به از شادیی کز پسش غم خوري»
Before the Statue of Liberty arrived in the United States, newspapers invited the public to help determine where ……… placed after its arrival.
Not only ……… places of beauty, but they also serve scientific and educational purposes as well.
