【判断题】IEEE 802.15.4网络是指在一个POS内使用相同无线信道并通过IEEE 802.15.4标准相互通信的一组设备的集合,又名LR-WPAN网络。在这个网络中,根据设备所具有的通信能力,可以分为全功能设备(Full Function Device , FFD)和精简功能设备(Reduced Function Device , RFD)。
【单选题】《一个人改变一座山的历史》中的“一个人”指的是( )
【单选题】.Although the teacher did not mention any names, everybody knew who he was
【单选题】(),欧美各国先后完成了工业革命,实现了由工厂手工业到大机器工业的过渡,标志着资本主义制度的最终确立。
【单选题】At the end of this meeting, they ______ an agreement that both sides should respect each other.
【简答题】My teacher did what he could to make his class ______ (live).
【简答题】Only an hour ago _______out why he was absent A did the teacher found B.the teacher found C.did the teacher find D.had the teacher found