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【判断题】
无线传感器常使用ZigBee作为其通信协议,在ZigBee网络中存在三种逻辑设备类型 ,分别是协调器(Coordinator),路由器(Router)和终端设备(End-Device)。
A.
正确
B.
错误
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【单选题】听力原文：W: Excuse me, how long can I keep the book? M: Two weeks. But you must return it here on time. Q: Where are the two speakers? (14)
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B.
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【简答题】下图是 2006 年至2011 年中国外贸进出口贸易总额直方图,根据该图可知,在 年进口贸易总额和出口贸易总额均出现逆增长,在 年,进出口贸易差最大。
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查看完整题目与答案
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A.
In a shop.
B.
At a library.
C.
At a bookstore.
D.
At a bus station.
查看完整题目与答案