电流互感器铭牌上所标额定电压是指一次绕组的额定电压

通过琼脂扩散试验检测羽髓中病毒抗原可作出诊断的疾病是（）

A.禽流感

B.新城疫

C.禽白血病

D.马立克氏病

E.传染性法氏囊病

美国十分重视公务员道德建设的（）和（）。

A.严管

B.严惩

C.自律

D.监督

He _____ home once a week, but after entering middle school, he _____ home once a month. [ ]

A. was used to go, was used to go

B. used to go, was used to go

C. was used to go, used to

D. used to go, was used to going

请结合资料主题，自拟题目，写一篇议论文。要求：观点明确，内容充实，结构完整，语言生动流畅，800～1200字。

分流旋翼式流量计按照管径比例分配到整个管来显示流量。