A. because they have a driving license B. because they have received special training C. because the traffic conditions in London are good D. because the traffic system of the city is not very complex 参考答案:B 答案解析:[听力原文]17-20 London taxi drivers know the capital like the back of their hands, no matter how
第11题: [多项选择]下述与牙合平面有接触的牙有 () A. 上颌侧切牙 B. 上颌中切牙 C. 上颌尖牙 D. 上颌第一前磨牙颊尖 E. 上颌第一前磨牙舌尖 参考答案:B, C, D