public class SyncTest{ public static void main(String args) { final StringBuffer s1= new StringBuffer(); final StringBuffer s2= new StringBuffer(); new Thread () { public void run() { synchronized(s1) { s2.append(“A”); synchronized(s2) { s2.append(“B”); System.out.print(s1); System.out.print(s2); } } } }.start(); new Thread() { public void run() { synchronized(s2) { s2.append(“C”); synchronized(s1) { s1.append(“D”); System.out.print(s2); System.out.print(s1); } } } }.start(); } } Which two statements are true? () [" The program prints “ABBCAD”"," The program prints “CDDACB”"," The program prints “ADCBADBC”"," The output is a non-deterministic point because of a possible deadlock condition."," The output is dependent on the threading model of the system the program is running on."]
机床几何精度检查一般在()状态下进行。 ["动态","静态","工作","空载","负载"]
堆肥法是利用自然界广泛分布的细菌、()菌和()菌等微生物,人为地促进可生物降解的有机物向稳定的()生化转化的微生物学过程。
在用发动机各气缸压力应不小于原设计值的()。 ["70%","75%","80%","85%"]
作用在物体上某一点的两个力,()合成一个力。 ["可以","不能"]
侵染性病害