【单选题】听力原文:W: Don't you think Professor Martin's test was too difficult? M: Well, I must admit I had been expecting more than a passing grade in biology. Q: What does the man mean? (14)
A.
The test was harder than he had anticipated.
B.
He was lucky to pass the biology test.
C.
Professor Martin is known for giving hard tests.
D.
He has never failed in biology.
【判断题】用均值电压表测量非正弦波电压时,读数乘以1.11,即可认为是被测波形的平均值。( )
【单选题】序列 的长度为 4 ,序列 的长度为 3 ,则它们线性卷积的长度是 , 5 点循环卷积的长度是 。
【判断题】若周期函数f(t)为偶函数,则三角级数展开式中一定有a0=0.
【单选题】冲压是整个制造过程的第一步,质量控制的关键是冲压所需的设备和()。
【单选题】序列 的长度为4,序列 的长度为3,则它们线性卷积的长度是( )。
【单选题】序列 的长度为4,序列 的长度为3,则它们线性卷积的长度为:( )
【判断题】中国特色社会主义民主制度,能够在现代化建设进程中维护社会公平正义。
【简答题】It's known that Zhang Ziyi is a famous actress. Zhang Ziyi a famous actress. 72. I think he is not so tall as his father. I think his father is him. 73. Why don't you ask others for help? ask others f...