化学性危险、有害因素包括哪些?
A programmer has an algorithm that requires a java.util.List that provides an efficient implementation of add(0,object), but does NOT need to support quick random access. What supports these requirements?() [" java.util.Queue"," java.util.ArrayList"," java.util.LinearList"," java.util.LinkedList"]
下面说法错误的是() ["模板必须创建可编辑区域,否则在使用模板时无法达到预期效果","为了达到最佳的网页兼容性可编辑区的命名应用中文","在模板中,蓝色为可编辑区,黄色是非编辑区","模板是一种特殊的网页"]
public class Person { private String name, comment; private int age; public Person(String n, int a, String c) { name = n; age = a; comment = c; } public boolean equals(Object o) { if(! (o instanceof Person)) return false; Person p = (Person)o; return age == p.age && name.equals(p.name); } } What is the appropriate definition of the hashCode method in class Person?() [" return super.hashCode();"," return name.hashCode() + age * 7;"," return name.hashCode() + comment.hashCode() \/2;"," return name.hashCode() + comment.hashCode() \/ 2 - age * 3;"]
化学除草剂在环境中的归趋及残留
简述农村社区健康教育策略方法。