The space between the maxillary central incisors in humans is called the ____________

In occupied buildings, carbon dioxide extinguishment systems are configured so a second independent detector activation is required to ___________

a. initiate discharge b. initiate testing c. provide enclosure integrity d. initiate evacuation

Symptom ____ are events such as multiple cases of diarrhea or flu-like symptoms.

A. groups B. clusters C. progressions D. indicators