请把1，2，3，4，5，6这几个数分别填在□里，使等式成立。
6+1=2+5=3+4
The previous lecture focused on the reading problems in new words, while this lecture will turn to
________ in complex sentence structures.[ ]
A. that
B. one
C. those
D. ones
根据32×18=576，直接写出下面各题的得数．
18×3.2=______
3.2×1.8=______
3.2×0.18=______
0.32×1.8=______．
