有节乳汁管
String foo = “blue”； Booleanbar = new Boolean [1]； if （bar[0]） { foo = “green”； } What is the result？（） [" Foo has the value of “”"," Foo has the value of null."," Foo has the value of “blue”"," Foo has the value of “green”"," An exception is thrown."," The code will not compile."]
有磁翻作用的磁选机，有利于（）的提高。 ["回收率","精矿品位","精矿产率"]
public class X { public static void main （Stringargs） { String s1 = new String （“true”）； Boolean b1 = new Boolean （true）； if （s2.equals（b1）） { System.out.printIn（“Equal”）； } } } What is the result？ （） [" The program runs and prints nothing."," The program runs and prints “Equal”"," An error at line 5 causes compilation to fail."," The program runs but aborts with an exception."]
硬聚氯乙烯管的管端插入甘油内的深度等于翻边宽度为（）。 ["5mm","8mm","10mm","15mm"]
简述抗震设防烈度如何取值。
