【单选题】关于MapReduce的体系结构的描述,下列说法错误的是?
A.
Task 分为Map Task 和Reduce Task 两种,分别由JobTracker 和TaskTracker启动
B.
slot 分为Map slot 和Reduce slot 两种,分别供MapTask 和Reduce Task 使用
C.
TaskTracker 使用“slot”等量划分本节点上的资源量(CPU、内存等)
D.
TaskTracker 会周期性接收JobTracker 发送过来的命令并执行相应的操作(如启动新任务、杀死任务等)
【单选题】Do you know the phone number _____________ the store? [ ]
【单选题】将竞争激烈的物种在时间、空间上合理配置,弱化竞争,从而提升农业生态系统的生产力,这是属于中国生态农业理论基础中的【 】。
【判断题】我们在从事字体的艺术创意设计时,不用严格遵守传统文字的形体结构规律。()
【简答题】阅读理解 Now, we know that if we do not get enough vitamins, we are at risk of developing a number of diseases. As a result, vitamin supplements(补品),though expensive, are popular with people who worry tha...
【单选题】We prospectively examined the relationship betweenpurported dietary risk factors and new cases _____ gout among 47,150 men whohad no history of gout _____ base line.
【单选题】matches(String regex)方法的返回类型是
【单选题】_____ number of students are coming to us, do you know _____ number of them? [ ]