下列哪个不是尺寸基准（）
A.制造基准
B.设计基准
C.工艺基准
参考答案：A
The day________ he was looking forward________ in the end.
A．when; to come
B．which; to come
C．when; to came
D．which; to came
WK-20型挖掘机行走驱动方式采用左、右履带（）。
