【简答题】已知x,y的取值如下表所示: x 2 3 4 5 6 y 2.2 3.8 5.5 6.5 7. 0 从散点图可以看出x与y线性相关. (1)求出线性回归方程 . (2)请估计x=10时y的值. 参考数据与公式:
【简答题】将直接引语变为间接引语 (每空一词)。 1. 'Where have you been these days?' he asked. He asked me ____ ____ ____ been ____ days. 2. 'I've found my wallet.' he said to me. He ____ me that he____ ____ ____ wallet. 3. 'I t...
【简答题】图10.2.7(a)所示的为一多谐振荡器,555定时器的内部结构原理图如图10.2.7(b)所示。已知R2=R1/3,求: (1)对应画出稳态时vC(t)及vO(t)的波形; (2)计算振荡周期T。
【简答题】用所给词的适当形式填空。 1. He asked me ______ (go) to the zoo. 2. Susan likes pop music, but her brother ______ (not, do) . 3. He wants ______ (join) school soccer team. 4. Mr Green hopes ______ (come) to China ...
【简答题】CMOS差分放大电路如图3.4.7所示。 已知 试求放大器的差模电压增益Avd=vo/vid。