ResvConf消息由发送者向下游逐跳转发,用于()()()。
参考答案:确认资源;预留;请求
陶弘景所辑的本草著作是( )
A.《证类本草》 B.《本草经集注》 C.《新修本草》 D.《本草纲目》 E.《神农本草经》
I had not been asked to the party, so I felt ______ and a bit hurt.
A.left out
B.left behind
C.left alone
D.left off