应用: 得物
任务: 打开得物，搜索“T恤”，点击商品页，选择尺码“M”
操作步骤:
step_id: 0
action: CLICK
step_id: 1
action: CLICK
step_id: 2
action: TYPE
type_text: T恤
step_id: 3
action: CLICK
step_id: 4
action: CLICK
step_id: 5
action: CLICK