Career planing about cognition.(认知层面) the first step to career planning is self-assessment. self-assessment (n. 自我评估) fin...

College students should focus on studies观点1： 学习是大学生的首要任务 result in lack of focus and low academic performance. academic (adj...

College students should work part-time jobs观点1： 发展职业技能，增强竞争力 acquire hands-on experience and a whole range of soft and hard s...

Q： Could you describe your hometown?A: My hometown is in the north of China. It is called lin quan.My hometown is a small cit...

Q: what often do you go out on weekends? A:I mostly like to stay at home with my cat on weekends.I often spend time reading i...

I’ve decided to share a little bit about myself and my life, and my hardships and my successes with you. You konow ,this worl...

创建索引 手动创建索引 123456789PUT /pai_search{ "mappings": { "properties": { "age&quo...

类加载器什么时候触发加载？ 使用new关键字实例化对象时； 访问类的静态方法； 反射 class.forName(); 初始化一个类时，发现其父类没有初始化； 虚拟机启动时，定义了main方法，那个类先初始化； Java 文件加载到内存的过程：...

为什么redis使用单线程反而更快？ 内存操作： redis是一个内存数据，内存的读写数据天生就是快； 单线程模型： 单线程模型避免了多线程上下文切花带来的开销 采用事件驱动的IO多路复用模型： 事件驱动的IO多路复用模型结合了非阻塞IO和事件...

mysql中有哪些锁？ 共享锁（Shared Locks 或 S 锁）： 共享锁允许多个事务同时读取同一数据，但不允许任何事务在同一数据上进行写操作； 排他锁（Exclusive Locks 或 X 锁）： 排他锁阻止其他事务读取或修改同一数据，...