About 20 million years ago, ____ appeared. This horse stood about 35 inches, and had teeth that were adapted to the grasses of the plains.
A. Mesohippus
B. Eohippus
C. Merychippus
D. Przewalski's horse
Answer: C
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Figure 22-1
In the accompanying figure, two float switches are necessary in this circuit because the tank is to be ____________________.
Fill in the blank(s) with the appropriate word(s).
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A ____ closet is a toilet or a room equipped with a toilet.
A. wet B. fresh C. sanitary D. water
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Why must the air from a heat pump operating in the heating mode be distributed carefully?
What will be an ideal response?
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Exhaust hoses should be used because one of the exhaust gases can be deadly in high concentrations. This gas is _________
A) Oxides of nitrogen (NOx) B) Hydrocarbons (HC) C) Carbon monoxide (CO) D) Carbon dioxide (CO2)
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