一、一个月;保甲法户籍外勤民警;主管人;20年;一年;五年;服务性。 二、AA;C;D;D;B 三、1、ABDE;2、ABD;3、AD;4、ABCE;5、BCE

1. For our English homework we have to write a paper. A three-thousand-word B. three-thousands-word C. three-thousand-words d. three -thousands-word 2. Jack English in the university for 30 years by the end of next mon A. will teach B. had taught C will have taught D. has taught

概述 一、信源的原始信号绝大多数是模拟信号,因此,信源编码的第一个任务是模拟和数字的变换,即:A/D,D/A 二、样率取决于原始信号的带宽:f=2×,w为信号带宽 三、抽样点的比特数取决于经编译码后的信号质量要求: SNR=6×(dB),L为量化位数

Complete each of the following sentences with the most likely answer. (25 points) 1. The teacher explained the point a second time, but everyone understand A. not even then does B. even then not did C. not even then did d. not even then 2. All flights because of the storm, they decided to go to Beijing by train. A. having been canceled B had been canceled C having canceled D. were canceled

1、试用上升沿D触发器组成一个4位二进制异步加法计数器并画出波形图 2、试用上升沿D触发器组成一个4位二进制异步减法计数器并画出波形图