进出口比价指数
参考答案：进出口比价指数又称产品贸易条件指数，是指出口商品价格指数与进口商品价格指数相比的比率。
_________ parents’ complaints, some cities have significantly cut school hours to give children more time for leisure and play.
A．In exchange for
B．In response to
C．In harmony with
D．In terms of
已知零件尺寸为500.008，零件最小极限尺寸应该是（）。
A、49.992
B、50.016
C、50.008
D、49.984
