A:蒸馏
B:沉淀
C:过滤
D:吸附
I am not afraid of tomorrow, ______ I have seen yesterday and I love today.
621 + 121 = 2- 14 = 89 - 23 = 27 + 47 + 17 =
910 + 110 = 35 + 13 = 716 + 332 = 2425 - 1325 - 625 =