污染物进入人体主要通过()、()和()三条途径。
为了从矿石中选出有用矿物,首先必须将矿石进行粉碎,使有用矿物和脉石() ["磨细","分解","单体解离"]
方案教学主题的选择需遵循哪些原则?
行政诉讼中实行证明责任倒置原则的原因是什么?
package foo; import java.util.Vector; private class MyVector extends Vector { int i = 1; public MyVector() { i = 2; } } public class MyNewVector extends MyVector { public MyNewVector () { i = 4; } public static void main (String args ) { MyVector v = new MyNewVector(); } } The file MyNewVector.java is shown in the exhibit. What is the result?() [" Compilation will succeed."," Compilation will fail at line 5."," Compilation will fail at line 6."," Compilation will fail at line 14."," Compilation will fail at line 17."]
简述单元教学和方案教学的差异。