体重12kg，身高87cm，头围48cm（）
A.2个月
B.6个月
C.12个月
D.2岁
E.6岁
参考答案：D
My father has worked in this factory fifteen years. [ ]
A. for
B. since
C. before
D. in
诊断慢性前列腺炎时，前列腺镜检白细胞数为（）
A.无
B.＜10个/视野
C.＞10个/视野
D.0～5个/视野
E.5～10个视野
