背一背,填一填。
伯牙善鼓琴,____。伯牙鼓琴,____,钟子期曰:“善哉,峨峨兮____!”志在流水,种子期曰:“善哉,洋洋兮____!”伯牙所念,钟子期必得之。子期死,伯牙谓世____,乃____,终身____。
使二次根式 x−1 有意义的x的取值范围是( )
— No, she doesn't. But his brother does.