【简答题】The world is not hungry,but it’s thirsty. 1 while we say we are short of water.Why?Because about 97% of water on the earth is sea water which we can‘t drink or use for watering plants directly.Man can...
【单选题】—Why was the ol d man so angry _____ his wife? —Because his wife never visited him _____ hospital. [ ]
【简答题】已知四阶行列式的第二行元素分别为1, 2, 0, -4, 第三行元素的余子式分别为6, a, 19, 2, 则 a =
【简答题】已知 四阶行列式 D 中第三列元素分别 为- 1,2,3,1, 它们的余子式分别 为 2,3,1,-9 ,求 D.
【判断题】移位寄存器除了可以寄存代码,还可实现数据的串行-并行转换,但不能用于数值运算和处理。