آزمون آنلاین زبان انگلیسی 2 - زبان انگلیسی 2 | آزمون شماره 5823

Any language is learned with constant … . That’s a fact!

To the ancients, electricity meant many things. They had no idea that there was any …(A)…between electricity and magnetism. It had some natural …(B)… . They saw lightning, but did not appreciate how it was caused. They knew that a certain fish called an “electric eel” could give a powerful electric shock; indeed, in old times it …(C)… as a cure for rheumatism. The Greeks knew that the fossil resin called elektron, …(D)…, became electrified when rubbed. They also knew that a dark-colored mineral found at Magnesia had properties of attraction and repulsion which we now call magnetic.

A- ...

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