应用: 百度
任务: 打开百度，搜索“四六级报名官网”，点击第一条结果
操作步骤:
step_id: 0
action: CLICK
step_id: 1
action: CLICK
step_id: 2
action: CLICK
step_id: 3
action: TYPE
type_text: 四六级报名官网
step_id: 4
action: CLICK
step_id: 5
action: CLICK
step_id: 6
action: STOP