_________________ are designed to take the water from a supply source and then discharge the water into the standpipe system under pressure

The principle of opposition means that Yin and Yang:

A) Control and restrict each other B) Cannot exist in isolation from each other C) Are infinitely divisible D) Are constantly transforming into each other

Sinusitis is considered a(n) ________

a. lower respiratory condition b. infectious disease c. mechanical injury d. general respiratory condition