????:1?????:???

2????????

3???669

4???????????

5???????98?

??????????????7?1???????????? (????????????????????? ?)???????7??????????1??(?????????????????)??,?????????????(Radon,Rn)?,????,?“?????????”?

??4??,???????????????????,???????????????,???????????222??220?????????5.3?????8.8???????????????(a)??????,??????

????????/?????????????????????

????????????,??????,????????????????,?????????????

?,?????????????,5???6?32.7?????????,?????????????????????????????10??,??????????????,???;5???????????????17?????????????????,??????5??10??11?????????????????????,?,?????,??32??????????????????????????????????,??????????????16???????????????????????????,???????????????????,????,??????????

????????????????????,???????????5????????????????23??,?111??????????????;6????????2????????,??????????,???,??????????????????????????,?????????????????????????6?4???????????????????????,????????

???????????????????????????/???

????????,?????????????????????????????????????????????????????????????????????????????????(?)??????,???????????????????????????????????,???????

?????????,?????2019??????6???????,???????????????????????????????????,????????????(Pierre-Yves Meslin)????(King Wah Wong)?????????????????????????????????????????(Aurélie Moussi);?????????????????????????????????????????????????????,??(?????????????)

???:?????????????????????