有线电视系统传输信号作为长线处理时其传输特性表现在()引起频响不均匀
A.低频介质损耗
B.介质高频损耗
C.介质绝缘度不好
D.增益不够
参考答案:B
给句子排排队。
( )他带着慈祥的微笑连连点头,向我这里走来。
( )邓爷爷高兴地连连点头,并和我亲切握手。
( )我连忙敬了个礼说:“邓爷爷,您好!祝您身体好!”
( )邓爷爷来了!
( )我沉着地操纵计算机,顺利地打出各种变化的图形来。
( )邓爷爷仔细地看了看我的表演,脸上露出了满意的笑容。
( )邓爷爷那和蔼可亲的样子使我紧张的心情平静下来。
— How did you go home after the party last night?
— Well, there were no buses________we had to walk. [ ]
A. so as to
B. in order to
C. so that
D. in order that