With so much noise of the traffic, I couldn’t ____ and do my research work.

A．put down

B．settle down

C．break down

D．take down

老年淡漠型甲亢不常见的是（）。

A.恶液质

B.阵发性或持续性心房纤颤

C.肌病

D.嗜睡、厌食

E.浸润性突眼