写出自古至今的通信发展。
喊话、飞马信使、驿站、烽火、飞鸽传书、电报、电话、传真、电脑网络。
— Look! Who is the man in the picture (图片)?
— I know. Zhou Xingchi.
下列有关锌锰干电池的说法中正确的是（ ）
Jane ____ (get) up at 7:30am every day. So she is always late for school.
