______是一个有众多趣味相投的用户共同组织起来的各种专题讨论组的集合。
参考答案：Usenet
根据句意及首字母提示填写单词。
1. Probably you could write a d____________ of your best friend.
2. She e_________ surprise when I told her how much it was.
3. I was s_________ to hear that the Chinese Football Team got the first place.
4. When I arrived he had a________ gone.
5. Have you w________ to your American pen friend?
以下函数调用语句中实参的个数是( )。 excc((v1,v2)， (V3，v4，V5)，V6)；
A．3
B．4
C．5
D．6
