What was the most deadly challenge Native Americans faced as a result of the encounter with Europeans?

a. mounted men
b. guns and armor
c. microbes
d. invasive animals and plants


c. microbes

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When you want information about a piping system, including service, pressure rating, temperature limit, maximum pressure, and the class of the system, you should look at the _____.

a. line number b. isometric drawing c. piping symbols d. specifications book

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When planning a vegetable garden, the soil should have a pH range of _____

A) 5.3 to 7.0 B) 6.3 to 7.3 C) 6.3 to 7.0 D) 6.0 to 7.3

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?What characteristic of some fluxes can help to push the weld penetration deeper?

A. ?The larger mass of some bigger electrode flux coverings add a great deal of weight to the slag covering that force the weld penetration deeper. B. ?Some fluxes act as a thermal blanket holding the heat into the weld which lets the weld penetrate deeper. C. ?The formation of a crucible at the end of the electrode that acts as a combustion chamber. D. ?The only way to get deeper weld penetration is to turn the welder's amperage to the maximum.

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The only location where the refrigerant vapor is superheated is in the evaporator.

Answer the following statement true (T) or false (F)

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