Most people call their boss and other colleagues by their last names.
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The British will say nothing when they are treated poorly in the restaurant because they don't want to make a scene.
A. 对
B. 错
British people say sorry if you stand on their toes.
A. 对
B. 错
正弦机构是由双滑块机构通过( )演化变异形成的。
A. 运动副演化变异
B. 机架变换
C. 构件形状变异
D. 运动副元素逆换
机构演化变异方法包括( )。
A. 机架变换
B. 构件形状变异
C. 运动副形状和等效变换
D. 以上说法全对
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