模拟集成电路不分线性与非线性。
参考答案：错
北朝末年，（）统一了中国北方。
A、北齐
B、北周
C、东魏
D、西魏
A box contains 100 balls, numbered from 1 to 100. If three balls are selected at random and with replacement from the box, what is the probability that the sum of the three numbers on the balls selected from the box will be odd
