### 默认

<!--start-code-->

```js
const instance = (
  <Grid fluid>
    <Row className="show-grid">
      <Col xs={2}>xs={2}</Col>
      <Col xs={2}>xs={2}</Col>
      <Col xs={2}>xs={2}</Col>
      <Col xs={2}>xs={2}</Col>
      <Col xs={2}>xs={2}</Col>
      <Col xs={2}>xs={2}</Col>
      <Col xs={2}>xs={2}</Col>
      <Col xs={2}>xs={2}</Col>
      <Col xs={2}>xs={2}</Col>
      <Col xs={2}>xs={2}</Col>
      <Col xs={2}>xs={2}</Col>
      <Col xs={2}>xs={2}</Col>
    </Row>

    <Row className="show-grid">
      <Col xs={4}>xs={4}</Col>
      <Col xs={4}>xs={4}</Col>
      <Col xs={4}>xs={4}</Col>
      <Col xs={4}>xs={4}</Col>
      <Col xs={4}>xs={4}</Col>
      <Col xs={4}>xs={4}</Col>
    </Row>

    <Row className="show-grid">
      <Col xs={8}>xs={8}</Col>
      <Col xs={8}>xs={8}</Col>
      <Col xs={8}>xs={8}</Col>
    </Row>

    <Row className="show-grid">
      <Col xs={12}>xs={12}</Col>
      <Col xs={12}>xs={12}</Col>
    </Row>
  </Grid>
);
ReactDOM.render(instance);
```

<!--end-code-->
