How do you do 1 plus 1

What is a common risk associated with tobacco?

Mucous membranes.. a. cover or line external surface of body. b. line internal body surfaces that are in contact with the environment. c. produce antibodies to combat infection. d. secrete sweat, which has antibacterial enzymes.

While they impact the environment, recycling programs, emissions standards, and renewable energy development cannot reverse or stop the global warming problem. in which type of research paper would this thesis statement appear? a. analytical b. argumentative c. personal narrative d. how-to informational manual