无线电发射机输出的射频信号，通过馈线（电缆）输送到天线。
参考答案：对
---______________ a hotel and a post office near the neighborhood?
---Yes. Just go straight and turn left and you will see them.
A Have B Has C Is there D Are there
几个月大的婴儿可将头转向声源:（）
A．2个月
B．3个月
C．4个月
D．5个月
E．6个月
