teacap
春芽
共回答了20个问题采纳率:85% 举报
1.four,eight ,twelve sixteen,twenty 4 8 12 16 20
2.three,six.nine,twelve,fifteen,eighteen 3 6 9 12 15 18
3.ten,twelve,fourteen,sixteen,eighteen,twenty 10 12 14 16 18 20
4.one,three,six,ten,fifteen,twenty-one 1 3 6 10 15 21
1年前
10