public class Mycircle { public double radius； public double diameter； public void setRadius（double radius） this.radius = radius； this.diameter= radius * 2； } public double getRadius（） { return radius； } Which statement is true？（） [" The Mycircle class is fully encapsulated."," The diameter of a given MyCircle is guaranteed to be twice its radius."," Lines 6 and 7 should be in a synchronized block to ensure encapsulation."," The radius of a MyCircle object can be set without affecting its diameter."]
通过调整进度管理的方法和手段来对项目目标进行纠偏，这属于纠偏措施中的（）。 ["技术措施","管理措施","组织措施","经济措施"]
关于断句符，以下说法正确的是（） ["断句符只能在标题中使用","断句符必须在标题前28个字符使用","断句符在标题和描述中均可使用","断句符必须在标题和描述的前28个字符使用"]
Which is a valid identifier？（） [" false"," default"," _object"," a-cla"]
话语
生产一单位产量所需要的资本量被称为（）。
