Mid-day rest periods are quite common. Business may be conducted later into the evening in Germany.
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An expensive watch is usually noticed and is considered a subtle symbol of success and prosperity in just about every culture doing international business.
A. 对
B. 错
可见螺纹的牙顶用________表示,牙底用________表示。
A. 细实线/细实线
B. 细实线/粗实线
C. 粗实线/细实线
D. 粗实线/粗实线
螺纹的三要素是________。
A. 牙型、大径、导程
B. 牙型、大径、旋向
C. 牙型、大径、螺距
D. 牙型、中径、线数
在画螺纹紧固件的连接时,两零件的接触面________,非接触面________。
A. 只画一条公共轮廓线/应画两条线
B. 只画一条公共轮廓线/应画一条明显加粗的线
C. 应画两条线/应画两条线
D. 只画一条明显加粗的公共轮廓线/应画两条线
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