问题 解答题
1
4-
1
3-
1
2-
1
3
答案

1
4-
1
3-
1
2-
1
3

=

1
4-
1
3-
1
5
3

=

1
4-
1
3-
3
5

=

1
4-
1
12
5

=

1
4-
5
12

=

1
43
12

=

12
43

单项选择题 A1/A2型题
问答题