H. complete the text. use past simple and past continuous. it (be) a rainy day of november. we (come) from school at 2 o’clock. we (not be) very hungry but we (be) cold. while we (walk) with my umbrella, we (find) a coin. it (not be) a normal coin, it (be) a strange coin. we (not continue) walking. we (be) a bit nervous. what should we do? maybe, we to (have) put the coin where we (find) it. we (do) this. we (walk) on the street, when a tall man (ask) us for the coin. we (tell) him that the coin (be) at the beginning of the street. we (know) what (happy), so we (continue) walking.

It was a rainy day of November. We came from school at 2 o’clock.

We weren’t very hungry but we were cold. While we were walking with my umbrella, we found a coin. It  was not a normal coin, it was a strange coin. We did not continue walking. We were a bit nervous. What should we do? Maybe, we had to put the coin where we had found it. We did this. We were  walking on the street, when a tall man asked us for the coin. We told him that the coin were at the beginning of the street. We knew what happened, so we continued walking.

 

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ALTERNATING CURRENT

Alternating current (AC) is an electric current which periodically reverses

direction, in contrast to direct current (DC) which flows only in one direction.

Alternating current is the form in which electric power is delivered to businesses

and residences, and it is the form of electrical energy that consumers typically use

when they plug kitchen appliances, televisions and electric lamps into a wall

socket. A common source of DC power is a battery cell in a flashlight. The

abbreviations AC and DC are often used to mean simply alternating and direct, as

when they modify current or voltage.

Тhe number of cycles per second is the frequency of an alternating current.

Тhere are two frequencies: the standard for Europe is 50 cycles per second while

the standard for the USA is 60 cycles per second. А standard frequency has а great

advantage since different systems сan bе interconnected.

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Объяснение:

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ALTERNATING CURRENT

Alternating current (AC) is an electric current which periodically reverses

direction, in contrast to direct current (DC) which flows only in one direction.

Alternating current is the form in which electric power is delivered to businesses

and residences, and it is the form of electrical energy that consumers typically use

when they plug kitchen appliances, televisions and electric lamps into a wall

socket. A common source of DC power is a battery cell in a flashlight. The

abbreviations AC and DC are often used to mean simply alternating and direct, as

when they modify current or voltage.

Тhe number of cycles per second is the frequency of an alternating current.

Тhere are two frequencies: the standard for Europe is 50 cycles per second while

the standard for the USA is 60 cycles per second. А standard frequency has а great

advantage since different systems сan bе interconnected.

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Объяснение: