精益物流系统认为存储不能增加产品的附加值，不仅是一种浪费，还会掩盖企业中的潜在问题。
参考答案：对
It was at that school ______ he realized his dream ______ he was going to be a teacher.
A．that; which
B．that; that
C．where; that
D．where; which
水力压缩式封隔器的坐封方式是（）。
A、张力+压重
B、一般不要求座封动作
C、下放压重
D、油管憋压
