举出一些铸造的工艺参数。
参考答案：
机械加工余量、起模斜度、收缩率、型芯头尺寸等。
— Did you sleep well here?
— _________. I was tired after the day's work and was soon dead to the world.
[ ]
A. Never worse
B. Much worse
C. Never better
D. Better off
合同债务的担保方式有（ ）
①抵押 ②质押 ③留置 ④定金
A．①②③④
B．①②④
C．①③④
D．②③④
