题目内容
下列各式
,
,
,
,
,
中,是分式的个数是( )
| 7 |
| 2a |
| a+b |
| 2 |
| 2 |
| 3a-1 |
| a-3 |
| π |
| x2-1 |
| x-1 |
| 3 |
| 5+x |
| A.3 | B.4 | C.5 | D.6 |
| a+b |
| 2 |
| a-3 |
| π |
| 7 |
| 2a |
| 2 |
| 3a-1 |
| x2-1 |
| x-1 |
| 3 |
| 5+x |
故选B.
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题目内容
| 7 |
| 2a |
| a+b |
| 2 |
| 2 |
| 3a-1 |
| a-3 |
| π |
| x2-1 |
| x-1 |
| 3 |
| 5+x |
| A.3 | B.4 | C.5 | D.6 |
| a+b |
| 2 |
| a-3 |
| π |
| 7 |
| 2a |
| 2 |
| 3a-1 |
| x2-1 |
| x-1 |
| 3 |
| 5+x |