lr

This page lists questions and answers that were posted by visitors named lr.

Questions

The following questions were asked by visitors named lr.

Answers

The following answers were posted by visitors named lr.

you can't create it, you can't destroy it, but it must remain a constant

To test the efficacy of a health education program in reducing the risk of foodborne and waterborne diseases, the residents of two villages were given an intensive health education program. At the end of two years, the incidence rates of important water-b...