29. Which of the following is not an example of a chemical contaminant?

a) Machine lubricant

b) Grill cleaner

c) Sanitizer

d) Norovirus

Which of these is a feature of audible pedestrian crosswalk signals? o a. pedestrian tracking o b. emergency instructions o c. button location signaling od. responses to voice commands

Blood cells bring oxygen to cells and take carbon dioxide away. true or false

Mary has spontaneously decide to make a meal for friends. she is beginning to prepare fin fish and realizes she wants to also prepare a hearty dish ready to serve at the same time. what should she prepare? a: rice which take 20 minutes b: past which takes 15 minutesc: baked potatoes, which take 50 minutes.d: grilled garlic bread,which takes 5 minutes.e: boiled dumplings,which takes 17 minutes.