阀控铅酸蓄电池运行期的故障主要表现在哪几方面?原因是什么?
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简述循环流化床锅炉床面结焦时,床温、氧量、火焰的变化情况。
除企业以外的全社会范围内的各种综合经济信息管理活动称为()
public class TestOne { public static void main (String[] args) throws Exception { Thread.sleep(3000); System.out.println(”sleep”); } } What is the result?()
A. Compilation fails.
B. An exception is thrown at runtime.
C. The code executes normally and prints “sleep”.
D. The code executes normally, but nothing is printed.