Why does the CEO invite Chris and his son to watch football with him?
A. He is moved by Chris’s sincere attitude.
B. He likes Chris’s son.
C. He has no companion to the football game.
D. He wants to know more about Chris’s family.
查看答案
带传动的打滑多发生在大带轮上。
A. 对
B. 错
带传动时只要不超载，弹性滑动和打滑都可避免。
A. 对
B. 错
在 html 中,下列css属性中不属于盒子属性的是()
A. Border
B. Padding
C. Float
D. Margin
边框的样式可以包含的值不包括：（ ）。
A. 粗细
B. 颜色
C. 样式
D. 长短
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