型号 AN806-2 ,AN806-3 ,AN806-4 是否定制 否 订货号 AN806-5 ~ ~AN806-16 类别 管接头 产品新旧 厂家新件 是否进口 是 发货方式 厂家直发 品牌 管接头 价格说明 价格:商品在爱采购的展示标价,具体的成交价格可能因商品参加活动等情况发生变化,也可能随着购买数量不同或所选规格不同而发生变化...
Version 4-8RED LEDs ON-OFF with sound 2016-03-31 17:50 00:20 Version 3-20RGB LEDs with 7 Functions 2016-03-31 17:14 00:20 Version 2-5 RGB LEDs with 7 Functions 2016-03-31 17:12 00:08 Version 1 -5LEDs ON-OFF function with sound 2016-03-31 17:12 00:12 779BB-3 2016-03...
Consequently, questions then arise as to whether the new policies and practices are control measures for teachers' performance and competence or do they represent an opportunity for authentic professional development? With this in mind, in the present paper, I will focus on how the new teacher ...
If you have an Microsoft 365 subscription, you can sign out of Office on a PC or Mac remotely from any web browser to deactivate the installation. Because Office will sign you out of devices automatically to stay within your sign-in limit, there's no longer a need to use this proc...
从创唯电子在线订购Fairchild Semiconductor LM339AN 4通道 比较器, 开路集电极输出, 1.3μs, 多种电源电压适用, 14引脚 PDIP封装 LM339AN或其他比较器并指定次日送货,可享受一流服务和大量电子元件享有更佳价格
解答:解:(1)设等比数列{an}的公比为q, ∵a3=4,a7=64,∴ a1q2=4 a1q6=64 ,解得a1=1,q=2. ∴an=1×2n-1=2n-1. (2)Sn= 1×(2n-1) 2-1 =2n-1. 点评:本题考查了等比数列的通项公式和前n项和公式,属于基础题. 练习册系列答案 ...
FDR800M1 - Fiber DAS Remote 806-869MHz CAFR-20A - 1/2 2 Hr Fire Resistive Cable CFL-LMR400-250 - Watertight cable Black 250 CFL-LMR400-500 - Watertight cable Black 500 FDM7800-LTEM1-1 - Fiber DAS Mast 7-800MHz FDM7800-LTEM1-2 - Fiber DAS M 2 7-800MHz FDM7800-LTEM1-4 ...
Find out all of the information about the Xi'an Yunyi Instrument Co., Ltd. product: radar level transmitter YUNYI-806A3. Contact a supplier or the parent company directly to get a quote or to find out a price or your closest point of sale.
C、-1212a2bn•(3anbn+1)=-3232a2+nb2n+1,错误; D、计算正确; 故选D. 点评此题考查了多项式的乘法以及完全平方公式.此题比较简单,注意掌握各定义与性质,注意解题要细心. 练习册系列答案 优化方案高中同步测试卷系列答案 上海达标卷系列答案 创新学习课课通系列答案 ...
摘要: An efficient protocol for the one-pot multicomponent synthesis of various 2,4,5-triaryl-1H-imidazoles and 1,2,4,5-tetraaryl-1H- imidazoles using PEG-400 as reaction medium is described.This method has the advantages of good yields,less pollution and simple reaction conditions.关键词:...