幼儿期是指
A.初生后至满3周岁
B.初生后第28天至满3周岁
C.初生后1个月至满3周岁
D.初生后1周岁至满3周岁
E.初生后2周岁至满3周岁
参考答案:D
Jenny is always absent from school, I suppose is why she is criticized now and then.
A.who
B.which
C.that
D.what
椎间盘突出
A.良性骨肿瘤B.恶性骨肿瘤C.有恶性倾向的良性骨肿瘤D.骨瘤样病变E.继发性骨肿瘤