The doctor            Robert carefully as soon as he was taken to the hospital.[ ]

A. look at      

B. looked over

C. look after    

D. looked for

蜡制成蜡型后应冷却固定，主要是为了防止

A．应力松弛变形

B．冷却收缩变形

C．蠕变变形

D．弹性形变变形

E．聚合收缩变形