应用: 百度
任务: 打开百度，问他今天股价多少
操作步骤:
step_id: 0
action: CLICK
step_id: 1
action: CLICK
step_id: 2
action: TYPE
type_text: 今天股价多少
step_id: 3
action: CLICK
step_id: 4
action: STOP