应用: 淘宝
任务: 打开淘宝,从淘宝首页，进入百亿补贴，找到一份小零食，加入购物车
操作步骤:
step_id: 0
action: CLICK
step_id: 1
action: CLICK
step_id: 2
action: CLICK
step_id: 3
action: CLICK
step_id: 4
action: CLICK