WSN
相似题目
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ZChSnSb8―4表示铸造（）基轴承合金，主加元素wSn为8%，辅加元素的质量分数为4%，其余合金元素为锡。
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将“信息社会技术”作为优先发展领域之一。其中多处涉及对WSN的研究，启动了EYES等研究计划的组织是（）
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下面哪项不是评价一个WSN路由协议设计的性能指标( )。
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Mry dropped in ____ Mr Smith, but he wsn’ tt home, so she went to drop in ____ Mr Smith’s officeMry dropped in ____ Mr Smith, but he wsn’ tt home, so she went to drop in ____ Mr Smith’s office.on, on B．t,t C．on.t D．t. on
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I spoke slowly,but my mening________.wsn’t gotcrossB．wsn’t gottC．didn’t getcrossD．didn’tI spoke slowly,but my mening________.wsn’t gotcross B．wsn’t gott C．didn’t getcross D．didn’t get for
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图5-31为组元在固态下互不溶解的Bi-Cd-Sn三元共晶相图投影图。请回答下列问题：①示意地绘出wSn=20％的变温截面图；②在投影图中标出合金I(wSn=10％，wCd=20％)的成分点，估计合金I的熔点，指出其平衡凝固时的初生相和室温组织；③合金Ⅱ、合金Ⅲ、ET的室温组织和合金I有何不同？
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WSN的三大核心部分不包括（）。
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Why did Slly refuse to workt heruntie’ s compny Becuse she wsn’t stisfied withWhy did Slly refuse to workt heruntie’ s compny Becuse she wsn’t stisfied with the job. B．Becuse she didn’t like herunt. C．Becuse the job is boring. D．Becuse the compny is frwy from the plce she lives.
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在WSN定位中，RSSI方法主要使用射频（RF)信号。（)
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WSN中的数据流向与Internet相同：终端设备主要从网络上获取信息。（)
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If I hdn’t been lucky enough to meet you. I relly _____ wht I would hve done.don’t knowB．hdn’If I hdn’t been lucky enough to meet you. I relly _____ wht I would hve done.don’t know B．hdn’t known C．wsn’t knowing D．wouldn’t know