Now everyone, please turn to Page and look at the picture.
A:Fifth; five
B:Five; fifth
C:Fifth; fifth
D:Five; five
87.6×0.34=____ 63.8×0.87=____
在往稀盐酸中逐渐滴入氢氧化钠溶液的过程中,当溶液的pH 达到2 时,溶液中的溶质有____