应用: 浏览器
任务: 打开浏览器，输入“www.sina.com.cn”，进入首页
操作步骤:
step_id: 0
action: CLICK
step_id: 1
action: CLICK
step_id: 2
action: TYPE
type_text: www.sina.com.cn
step_id: 3
action: CLICK
step_id: 4
action: STOP