青书学堂: 周期信号的傅立叶变换为( )
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https://s3.cn-north-1.amazonaws.com.cn/qingshuxuetang/examination/imgUplod/15877183883929eaf37afdb034a6a8f5dd8992980d485image95.png
举一反三
- 青书学堂: 对矩阵A作如下的Doolittle分解： ，则的值分别为2，2。（ ） https://s3.cn-north-1.amazonaws.com.cn/qingshuxuetang/examination/imgUplod/153181599162517f380c797ed4647bdd48e76fb4920a1image32.png,https://s3.cn-north-1.amazonaws.com.cn/qingshuxuetang/examination/imgUplod/1531815991695ad5ca644c1354bd8a62827a3a347ebacimage33.png,https://s3.cn-north-1.amazonaws.com.cn/qingshuxuetang/examination/imgUplod/1531815991766e071845b1044436990ce23b60e1da1bcimage34.png,https://s3.cn-north-1.amazonaws.com.cn/qingshuxuetang/examination/imgUplod/1531815991837fca60c6e252e4f048ec6a4806e247214image35.png
- 青书学堂: (填空题) 设随机变量,则___. https://s3.cn-north-1.amazonaws.com.cn/qingshuxuetang/examination/imgUplod/15160697492918c1cb372bdd24f8d8083933f84551ca5image27.png,https://s3.cn-north-1.amazonaws.com.cn/qingshuxuetang/examination/imgUplod/1516069749405a50216da00434fd6b73d926fe3aff644image28.png
- 青书学堂: 、101.325kPa的过冷水的化学势( )同温同压下冰的化学势。 https://s3.cn-north-1.amazonaws.com.cn/qingshuxuetang/examination/imgUplod/15088163201001cf97c2794b443ac8f2add2e2ff503c1image6.png,https://s3.cn-north-1.amazonaws.com.cn/qingshuxuetang/examination/imgUplod/150881632018305c1d995d8dc45fa8fd520ae545a0abcimage7.png,https://s3.cn-north-1.amazonaws.com.cn/qingshuxuetang/examination/imgUplod/1508816320274cfcb5c43d42e433fbd975c6da0d2aa02image8.png
- 青书学堂: 接受原假设,不一定是正确的。 https://s3.cn-north-1.amazonaws.com.cn/qingshuxuetang/examination/imgUplod/158743382601800d59f0e0eb44339963f635749b935f1image11.png,https://s3.cn-north-1.amazonaws.com.cn/qingshuxuetang/examination/imgUplod/15874338260664235723d21ef4ec4bc7b8345850aab10image11.png
- 青书学堂: 二次型f(x1,x2,x3)=的秩为( ) https://s3.cn-north-1.amazonaws.com.cn/qingshuxuetang/examination/imgUplod/1517467227727726ce1b4a8b24016b3baf35f04caf93cimage6.png