问题 填空题
1=
()
2
=
3
()
=
()
4
=
9
()
=
()
21
=
1000
()
答案

1=

2
2
=
3
3
=
4
4
=
9
9
=
21
21
=
1000
1000

故答案为:2,3,4,9,21,1000.

单项选择题
单项选择题