Report copyright - 8 차시 - KOCWcontents.kocw.net/KOCW/document/2014/gacheon/limyoungkhi/... · 2016. 9. 9. · - 8반감기가 10 년 이상인 Th(1.41U(4.468238 ×109 년), 232 ×1010년), 235U(7.04×108)
Please pass captcha verification before submit form
Please pass captcha verification before submit form