Look at the pride on Tom's face. He______ to have been praised by the manager just now.[ ]

A. seemed  

B. seems

C. had seemed  

D. is seeming

下列哪项与二氧化碳潴留无明显关系（）。

A.搏动性头痛

B.白天嗜睡

C.贫血貌

D.心率加快

E.球结膜充血水肿