departure gate——登机口
第1题：
To speed up the ______of letters, the Post Office introduced automatic sorting.
A)treatment B)delivery C)transmission D)departure
为了加快信件的分配速度，邮局采取了自动排序
选B
第2题：
第3题：
A．错误
B．正确
第4题：
8253—5工作于方式 0，当门控信号 GATE为（）电平时计数，GATE为（）电平时禁止计数。
第5题：
GATE是指什么？
第6题：
第7题：
在调整候机区、登机口时，应避免（）。
第8题：
David and Xiaoyan arrived at the airport in good time. After checking in at the BA (British Airways) desk, they had their boarding passes checked, put their bags through the X-ray machine and went through the passport control on their way to the departure lounge. They didn抰 have anything to eat because they would eat on the plane, but they had a coffee and then they looked round the shops. Xiaoyan bought something for Mary, but David didn抰 buy anything. Then they went to the gate. They had about 20 minutes to wait before embarking. Suddenly David realized that he hadn抰 got his camera with him. They went back and looked everywhere to see where he could have lost it --- in the shops, in the cafe, at the X-ray machine, at the passport control and at the checking-in desk, but nobody had seen it. 揑 must have left it in the cafe,?said David, 揑 should have put it in my bag. I suppose someone must have walked off with it!?
(1). When they arrived at the airport, they had ().
A、 hardly any time
B、plenty of time
C、just enough time
(2). They first went ().
A、 to a restaurant
B、to the checking-in desk
C、through the passport control
(3). David realized that his camera was missing when he was ().
A、 in the cafe
B、in the departure lounge
C、at the gate
(4). They looked for the camera everywhere except ().
A、 in the shops
B、at the X-ray machine
C、on the plane
(5). David thought he must have left it ().
A、 in the cafe
B、in the taxi
C、at home
第9题：
领队在开行前说明会时，要告知客人航班信息：登机时间、（）登机口、如何前往登机口、当地时差。
第10题：
要使8254通道2工作于方式3输出非对称的周期性方波，必须有（）。