尽量将铸件的大部或全部置于同一箱内,以减少因分型面造成的()。
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材料在吸水饱和状态下,材料所能经受多次反复冻结与融化的性能称为抗冻性。
A. 正确
B. 错误
运行速度是堆垛机的一个主要技术参数,是指堆垛机在水平方向上的行驶速度。
A. 正确
B. 错误
If he is a common carrier,he is absolutely responsible to the owner of the goods carried ()any loss or damage to them unless caused by an Act of God or the Queen’s enemies,or the inherent vice in the goods themselves,or the negligence of the owner of the goods,or a general average sacrifice.
A. by
B. to
C. at
D. for