咨询活动是中小学班主任工作的重要组成部分。( )
参考答案：错
以下哪些项是属于上行通道射频指标（）
A.阻塞与互调抑制
B.邻道泄漏
C.接收灵敏度
D.杂散响应
The new students _____ the classroom, and now they _____ the library. [ ]
A. have been to…have gone to
B. have gone to…have been to
C. have been to…went to
D. went…have been to
