[填空题]
In a certain town the average yearly background radiation consistsr4p, ugf8 w67u nb/hrzlklt: / of q9r, cvz8e. cv q twb8n96vp1i21 mrad of X-rays and v .rceb,9 8 1pnvicvqzqt68w9$\gamma$ rays plus 3.0 mrad of particles having a QF of 10. How many rem will a person receive per year on the average?dose(rem) = $ \times 10^{-2}\ \text{rem/yr}$