题目内容

全口义齿基托边缘与唇颊沟、舌沟、上颌后堤区及下颌磨牙后垫处相接触的区域属于

A. 主承托区
B．副承托区
C．边缘封闭区
D．缓冲区
E．翼缘区

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Questions 6 & 7 are based on the following news item. At the end of the news item, you will be given 10 seconds to answer each question.Now listen to the news. Which statement is not true about Doha round

A. It is not sure whether the Doha round can be finalized in several months.
B. 148 nations are involved in this round.
C. These nations have to achieve a deal before they reach an agreement on the negotiating package.
D. WTO chief is not pessimistic about the future.

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