题干
下列方程:①
=1;②
=2;③
=
④
+
=5;⑤
+
=4.其中是分式方程的是( )
| x |
| − |
| 3 |
| 5 |
| 3 |
| x |
| 1 |
| + |
| x |
| 5 |
| + |
| x |
| 1 |
| 2 |
| x |
| 2 |
| 2 |
| x |
| 2 |
| + |
| 1 |
| x |
| π |
| x |
| 2 |
| π |
A：①②
B：②③
C：③④
D：②③④
答案(点此获取答案解析）
D
