负责医疗预防保健机构中的药品不良反应监测工作A．国家药品监督管理局B．省级药品监督管

以下疾病中对口腔功能影响最大的是（）

A.牙体缺损

B.颞下颌关节疾病

C.牙列缺失

D.上颌牙列缺损

E.下颌牙列缺损

相同体积的铁块和铝块，_________的质量大；相同质量的铁块和铝块，__________的体积大。

Caz is a director of Dull plc, but she also carries out her own business as a wholesale supplier of specialist metals under the name of Era Ltd.Last year Dull plc entered into a contract to buy a large consignment of metal from Era Ltd. Caz attended the board meeting that approved the contract and voted in favour of it, without revealing any link with Era Ltd.Required:Analyse the situation explaining any potential liability that Caz may have in relation to the sale of the metal to Dull plc by Era Ltd. (10 marks)

在碳钢中，Si、Mn主要用于（）。

A．脱氧

B．改善钢的机械性能

C．改善钢的铸造性能

卖方不交货(包括交货不足)，包括不交单据。 ( )