The main serving etiquette mentioned in Paragraph 4 is about the position of the teapot and dishes.
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According to the traditional Chhinese etiquette, other diners cannot eat before the guest of honour begins to eat.
A. 对
B. 错
Many ancient taboos regarding the use of chopsticks are still observed today.
A. 对
B. 错
There may be regional variations in dining etiquette in China.
A. 对
B. 错
关于十二指肠，错误的是 ( )
A. 可分为上部、降部、水平部和升部
B. 为腹膜内位器官，但无系膜
C. 幽门后约2.5cm长的一段称十二指肠球，为十二指肠溃疡的好发部位
D. 降部后内侧壁上的十二指肠大乳头为胆总管和胰管的共同开口处
E. 水平部的前面紧邻肠系膜上血管，动脉硬化时可致此部肠管受压迫而影响食物通过
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