The ability to distinguish colors depends on the cones of the retina, which react to light and permit us to see shades of red, green, and ________

A normal heart rate, neither abnormally slow nor fast, is between ________ beats per minute

a. 20 and 30 b. 40 and 60 c. 60 and 100 d. 100 and 120

Which equipment is powered by small gasoline or diesel engines, generally has 11- and/or 220 volt capability, and is available with power capacities up to 5,000 watts?

A. Inverter B. Mini-generator C. Portable generator D. Vehicle-mounted generator