题目

  关于x的方程5－a(1－x)＝8x－(3－a)x的解是负数，则a的取值范围是        .   答案：a> 5解析:略  —What do you think of your camping?—Great.We fell asleep in the tent,listening to the________of the stream. A.sound B.noise C.voice D.whisper