Things that are not eaten like bones should be put on the table when you are having dinner on some formal occasions.
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If you are invited to a dinner party, you’d better not do anything until the host does it first.
A. 对
B. 错
Things that are not eaten like bones should be put on the plate.
A. 对
B. 错
强度是指( )
A. 材料抵抗变形的能力
B. 材料抵抗破坏的能力
C. 材料保持平衡的能力
D. 材料承受力的能力
刚度是指( )
A. 材料抵抗变形的能力
B. 材料抵抗破坏的能力
C. 材料保持平衡的能力
D. 材料承受力的能力
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