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Sore throat - reasons, what to do, how to treat, medicines and folk remedies
Every person during an illness wants to know how to quickly relieve a sore throat. There are different methods. Can be used for both medications and...
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Periodic functions Periodic function of time
Purpose: to generalize and systematize students' knowledge on the topic "Periodicity of functions"; to form skills in applying the properties of a periodic function, finding ...
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