已知一次函数y=kx+3，如果y随x的增大而减小，那么k需要满足的条件是______．
∵y随x的增大而减小，
∴k＜0．
Mrs. Brown was much disappointed to see the washing machine she had had ____ went wrong again.
A．it
B．it repaired
C．repaired
D．to be repaired
在放大电路中，晶体管出现饱和是由于（）。
A.工作点偏高
B.工作点偏低
C.RC不合适
D.EC不合适
