abstract class abstrctIt { abstract float getFloat （）； } public class AbstractTest extends AbstractIt { private float f1= 1.0f； private float getFloat （） {return f1；} } What is the result？ （） [" Compilation is successful."," An error on line 6 causes a runtime failure."," An error at line 6 causes compilation to fail."," An error at line 2 causes compilation to fail."]
地震烈度
跌开式熔断器的安装应保证熔丝管与垂线有150一300的夹角。
网目是指（）长度中所包括的正方形筛孔数目。 ["一英寸","一平方英寸","一厘米","一平方厘米"]
在库珀看来，客观责任与从外部强加的可能事物有关，其具体形式包括（）。 ["对责任的感觉","职责","对责任的信念","应尽的义务"]
问题识别
