The first birds and mammals appeared 135 million years ago during the ____________________ period

Fill in the blank(s) with correct word


Jurassic

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At what depth should a freezeproof hydrant be buried?

What will be an ideal response?

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The processing and distribution of food is a relatively small industry in the United States

Indicate whether the statement is true or false

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Extension lines are construction lines that are drawn a little heavier than ________ lines and are left on the drawing.

Fill in the blank(s) with the appropriate word(s).

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A quantitative measure of noise immunity is called noise ________

Fill in the blank(s) with correct word

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