高速钢钻头钻钢件时，允许的切削速度为（）m/min。 [" 8～12"," 14～22"," 16～24"," 30～35"]
public class X implements Runnable （ private int x； private int y； public static void main（String [] args） （ X that = new X（）； （new Thread（that）） . start（ ）； （new Thread（that）） . start（ ）； ） public synchronized void run（ ） （ for （；；） （ x++； y++； System.out.printIn（“x = “ + x + “， y = “ + y）； ） ） ） What is the result？（） [" An error at line 11 causes compilation to fail."," Errors at lines 7 and 8 cause compilation to fail."," The program prints pairs of values for x and y that might not always be the same on the same line （for example， “x=2， y=1”）"," The program prints pairs of values for x and y that are always the same on the same line （for example， “x=1， y=1”. In addition， each value appears twice （for example， “x=1， y=1” followed by “x=1， y=1”）"," The program prints pairs of values for x and y that are always the same on the same line （for example， “x=1， y=1”. In addition， each value appears twice （for example， “x=1， y=1” followed by “x=2s， y=2”）"]
混凝土外加剂按其主要功能的分类中，可以改善混凝土耐久性的外加剂包括（）。 ["减水剂","引气剂","早强剂","防水剂","阻锈剂"]
举证时限制度
简述砖基础砌筑的质量标准。
最佳探测波段
