If you have got _____temperature without coughing, perhaps you have caught _____cold. Just stay in _____bed. Don’t think that you have got SARS?

A．the; the; /

B．a; a; /

C．a; the; the

D．a; a; the

下列说法正确的是（　　）

A．我国流通的硬币材质是金属单质

B．所有的不锈钢都只含有金属元素

C．镁合金的硬度和强度均高于纯镁

D．广东正在打捞的明代沉船上存在大量铝制餐具