方法 1
方法 1 的 2:手机
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1
打开Facebook Messenger。根据提示输入用户名和密码，然后点击登录。
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2
点击 认识的人。这个菜单栏位于屏幕最下方。
如果你用的是安卓手机，可以在屏幕顶部附近找到该菜单栏。
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3
点击 在线。所有在线的朋友都会出现在屏幕列表中。
你还可以在屏幕顶部的搜索栏中输入朋友的名字进行查找。如果朋友在线，他的照片旁边将会显示一个蓝色的小Messenger图标。
如果你的朋友没有使用Messenger，那么即便登录了脸书，他的姓名也不会出现在列表中。
X
研究来源
WH.ads.addBodyAd(‘method_ad_1’)
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方法 2
方法 2 的 2:网页
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1
通过浏览器登录Facebook。根据提示输入用户名和密码，然后点击登录。
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2
点击开始聊天。这一选项在页面的右下角。点击后将弹出一个小窗口。
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3
在聊天搜索框中输入朋友的姓名。搜索结果将显示在聊天框中。
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4
看看朋友姓名旁边是否有绿色的圆圈。如果有，说明朋友在线，你们可以开始聊天了。
你的好友可以更改聊天设置，隐藏自己的在线状态。如果是这样，你就无法判断对方是否在线。
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