当k=______时，代数式x6-5kx4y3-4x6+
|
代数式x6-5kx4y3-4x6+
x4y3+10中不含x4y3项，1 5
即-5kx4y3-4x6和
x4y3合并以后是0，1 5
则得到-5k+
=0，1 5
∴k=
．1 25
答：当k=
时，代数式x6-5kx4y3-4x6+1 25
x4y3+10中不含x4y3项．1 5
I first went to hear a live rock concert when I was eight years old.My brother and his friends were all ____ of a heavy metal group called Black Wednesday.When they ____ that Black Wednesday were going to perform at our local theatre, they all bought ____ for performance.However, at the last minute, one of the friends couldn't go, so my brother ____ me the ticket.I was really ____！ I remember the buzz (嘈杂声) of excitement inside the theatre as we all found our ____.After a few minutes, the lights went down and everybody became ___.I could barely make out the stage in the ____.We waited.Then there was a roar from the crowd, like an explosion, as the first members of the band ____ the stage.My brother leaned over and shouted something in my ear, but I couldn't ___ what he was saying.The first song was already starting and the music was as ____ as a jet engine.I could ____ the drum beats and bass notes in my stomach. I can't recall any of the songs that the band played.I just ____ that I really enjoyed the show and didn't want it to ____.But in the end, after three encores (加演), the show finished.We left the ____ and walked unsteadily out onto the pavement.I felt a little dizzy, as if I had just ___from a long sleep.My ears were still ____with the beat of the last song. After the____， I became a Black Wednesday fan too for a few years before getting into other kinds of music.Once in a while，____， I listen to one of their songs and ____I'm back at that first show.
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