Which material used to produce concrete is an inert mineral that reduces the amount of cement that would otherwise be needed?
A. Stone
B. Water
C. Aggregate
D. Portland cement
C
Health Professions
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How often should a medical transcriptionist who performs all his or her work while seated at the computer take a short break to move around and stretch?
a. Every 10 minutes b. Every 20 to 30 minutes c. About once an hour d. Every 2 to 3 hours
Health Professions
Which of the following is not in the middle layer of the eye?
A. Choroid B. Ciliary body C. Iris D. Cornea
Health Professions