The science concerned with designing equipment and environments for human needs is called

If it is necessary to approach a horizontal flammable-gas cylinder, you should approach ______.

a. perpendicular to the side b. via the shortest, most direct route c. from a 45 degree angle to the side d. from either end

Controlled human studies may show fetal risks that outweigh any possible benefits of the use of a drug during pregnancy. Which of the following drug categories is best described by the previous sentence?

A) X B) D C) B D) A