下列是有关安全用电的几种说法，请你补充完整． （1）严禁湿手插拔电源插头．是因为

-Why didn't you attend the party ________ in the hall the other day?

-I just wanted some quiet time by myself.[ ]

A．held  

B．being held

C．to be held  

D．holding

(2013·高考湖南卷)—Have you heard about the recent election?

—Sure，it________the only thing on the news for the last three days.

A．would be

B．is

C．has been

D．will be

关于X线强度分布的叙述，正确的是（）

A.与靶面倾斜角度无关

B.阴极端X线强度弱

C.照射野内分布均匀

D.X线管短轴方向两侧对称

E.与靶面状况无关

（）不得搭、拆脚手架

缺铁性贫血最可靠的诊断依据是

A．典型小细胞低色素性贫血

B．增生性贫血

C．小细胞性贫血

D．低血清铁伴有骨髓储存铁缺乏

E．低血清铁