题目内容
下列各式中
，
，
x+
y，
，
，分式的个数有（ ）
| 4 |
| x-y |
| 5b |
| 3a |
| 2 |
| 3 |
| 1 |
| 2 |
| 1 |
| xy |
| a |
| 5+π |
| A．4个 | B．3个 | C．2个 | D．1个 |
| 2 |
| 3 |
| 1 |
| 2 |
| a |
| 5+π |
| 4 |
| x-y |
| 5b |
| 3a |
| 1 |
| xy |
故选B．
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故选B．
题目内容
| 4 |
| x-y |
| 5b |
| 3a |
| 2 |
| 3 |
| 1 |
| 2 |
| 1 |
| xy |
| a |
| 5+π |
| A．4个 | B．3个 | C．2个 | D．1个 |
| 2 |
| 3 |
| 1 |
| 2 |
| a |
| 5+π |
| 4 |
| x-y |
| 5b |
| 3a |
| 1 |
| xy |