听句子,选择正确的答语。
A:She was sleeping.
B:At home.
C:She watches TV.
下列词语中,有两个错别字的一项是( )
tall he is now! But last year he was and thin.
想一想,填一填。
下列函数中,周期为π,且在区间π4,3π4上单调递增的函数是( )