The White Horse Temple in Luoyang is one of the first historic buildings________ to receive special state protection.

A．listed

B．having been listed

C．being listed

D．listing

放出NO，增加胞内cGMP水平，使血管扩张而降压（）

A．巨幼红细胞性贫血 

B．梗阻性黄疸所致出血 

C．缺铁性贫血 

D．血小板亢进症 

E．肿瘤放、化疗后引起的贫血