Those don’t translateto anything
The respiratory system works directly with the circulatory system to provide oxygen to the body. Oxygen taken in from the respiratory system moves into blood vessels that then circulate oxygen-rich blood to tissues and cells.
Answer:
<h3>Measurement : The process of compering an unknown quantity with an known quantity system is called measurement.</h3>
<h3>Unit : The fixed quantity of measurement is called unit.</h3>
<h2> Didn't you do this exercise from books or from Google.</h2>
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A best completes the sentence
<span>Kennst du den Weg?
</span><span>Kennen Sie den Weg?
Sie is used formally. Du is singular and plural.
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