使用axios发送post请求时，如何使用queryParams传递参数

let params:Url.URLParams = new Url.URLParams()
params.append("fod" : '1')
params.append("bard" : '2')
axios.post('https://developer.mozilla.org/?' + params.toString()).then(res => {
  this.message = "request result: " + JSON.stringify(res.data);
}).catch(err => {
  this.message = "request error: " + err.message;
})

axios({
  url: 'https://developer.mozilla.org/?',
  method: 'post',
  params: {
    fod: '1',
    bard: '2',
  }
}).then(res => {
  this.message = "request result: " + JSON.stringify(res.data);
}).catch(err => {
  this.message = "request error: " + err.message;
})