下面的程序中，哪行会报错？ public class statictest { int age; string name; static int totalfee = 500; public void showname() { system.out.print(this.name); } public static void showtotalfee() { line 1： system.out.print(totalfee); line 2： showname(); } public static void main(string[] args) { line3： statictest.showtotalfee(); } }
___________is the most common cause of vision loss in people over age 40 and is the principal cause of blindness.
the menstrual disturbances mainly manifested dyenorrhea, excessive bleeding and delayed menstrual cycles.
以下四类方法的分割结果按可重复性（reproducibility）从大到小排序正确的是：
influenza is characterized by fever, myalgia, headache, pharyngitis, cough and prostration.
外形尺寸在30-100cm的中型设备，噪声测量的测点到设备表面的距离为（）
查找资料，给出“基因功能组编辑"的英文名词解释，不超过120字
周围物体表面温度超过人体表面温度时，周围物体向人体辐射热能使人体受热，称为负辐射。
the key points to decrease the morbidity and mortality of pancreaticoduodenectomy are delicate operative maneuver and effective perioperative treatment.
下列关于灰度直方图的描述不正确的是？
infection of the hip joint is most common in the neonate.