配货时，大多是按照入库日期的“（ ）”原则进行。
A．先进先出；
B．先进后出；
C．后进先出；
D．任其自然。
参考答案：A
化简：（2x-1）2-（3x-1）（3x+1）+5x（x-1）．
It was from only a few supplies that she had bought in the village ______the hostess cooked such a nice dinner
A．where
B．that
C．when
D．which.
