The immobile adolescent with a recent fractured femur suddenly complains chest pain, dyspnea, diaphoresis, and tachycardia. Which of the following would the nurse suspect

A．Atelectasis.

B．Pneumonia.

C．Pulmonary edema.

D．Pulmonary emboli.

有当代学者评论道：它“具有两重性又长期代表中央分驭各地，所握权力大而不专，七百年来给中国社会带来的影响既深且巨。”这里的“它”指（）

A.郡

B.封国

C.行省

D.内阁