A．UNⅡ-1
B．UNⅡ-2
C．UNⅡ-3
D．UNⅡ-4.1
A．
B．
C．
D．
[单选题]F．CC和ETSI为使用频段UNⅡ-2和UNⅡ-3，加上了什么样的要求?(选择所有正确答案)A．DFCB．TPCC．CSMA/CAD．MIMOA．B．C．D．
[问答题] 计算题：一台三相电动机，电压UN为380V，电流IN是11A，cosφ=/2，sinφ=0.5，试求有功功率P，无功功率Q？
[单选题]小型光伏电站频率在50%UN≤U＜85%UN时最大分闸时间为（）。A . 0.1sB . 0.2sC . 0.5sD . 2s
[单选题]Is a massive volume of structured and unsteuctured data so large it is difficult to process using traditional database or software technique（ ）.A．Data Processing systemB．Big DataC．Data warehouseD．DBMS
[单选题]11a工作在全球通用的哪一ISM频段( )。A．2 GHzB．3 GHzC．5 GHzD．10 GHz
[单选题]数字证书在International Telecommunications Union（ITU）的哪个标准中定义的？（）A . X.400B . X.25C . X.12D . X.509
[问答题] 计算题：某变压器额定容量为100kVA，额定电压UN1＝6300V，UN2＝400V，Y，y0～Y，y11接法，现将电源由原来的6300V改变成10000V，若保持低压绕组匝数不变，即N2＝40匝，求原来的高压绕组是多少匝？新的高压绕组为多少匝？
[试题](ii) Explain the accounting treatment under IAS39 of the loan to Bromwich in the financial statements ofA．mbush for the year ended 30 November 2005. (4 marks)
[单选题]The plunger in a jerk pump is rotated until the release port is uncovered If the port remains uncovered all of the time, which of the listed operations will occur?A．No fuel will be deliveredB．The maximum effective stroke will be attainedC．The fuel de
[单选题]Cost of pipeline is very different of underground conditions. Is it right? （）A . NotB . YesC . They can’t compareD . Not discussion in the paragraph