R 5. An air-purifying respirator with high-efficiency particulate air (HEPA)
cartridges may provide effective protection against:
A. Carbon Monoxide
B. Aerosols
C. Hydrogen Sulfide
D. Formaldehyde
E. Oxygen-Deficiency

answer:

science is the study of the nature and behavior of natural things and the knowledge that we obtain about them. a science is a particular branch of science such as physics, chemistry, or biology. physics is the best example of a science which has developed strong, abstract theories.

pseudoscience is a collection of beliefs or practices mistakenly regarded as being based on scientific method.

plz rate as brainliest

answer:

when he is talking to you he wont look at you or gaf that you are alive, that is how you know

explanation:

answer:

design model: consists of design geometry; can be 2d or 3d; typically has a black background.

design files: drawing created with microsoft expression design, a drawing and design program for windows; may contain both vector and raster graphics; can also include multiple layers and various image effects.

elements: an element is a single part of a larger group.