维修成型模时压边圈磨损故障的修理方法是（）。
A.镀铬法
B.挤捻法
C.焊堆法
D.更换压边圈
参考答案：D
How would you use the two concepts—acquisition and learning in the monitor hypothesis—in your teaching of English
交接箱箱门开启角应大于等于（）。
A.100°
B.110°
C.120°
D.130°
