Which of the following are the stages an insect goes through in a gradual metamorphosis?

a. Egg, larvae, pupa, adult c. Egg, nymph, adult
b. Egg, adult d. Egg, larvae, nymph, naiad, adult


C

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List at least three material properties that engineers consider when selecting a material for a design project.

What will be an ideal response?

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Waste oil burners may need to be upgraded to accommodate which maximum grade of oil?

A) B2 B) B3 C) B4 D) B5

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In refrigeration and air conditioning, safety controls are wired:

A) In parallel with the power supply. B) In series with the load they protect. C) In parallel with the load they protect. D) In either series or parallel with the load they protect.

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Which of the following problems could occur if a humidifier is not regularly cleaned and checked for operation?

A) excessive dryness B) mold growth C) CO poisoning D) nickel in the water supply

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