继舒伯特之后,德国艺术套曲的巅峰之作是() ["《图画展览会》","《诗人之恋》","《狂欢节》","《四季》"]
生物膜
1. class A { 2. public String toString () { 3. return “4”; 4. } 5. } 6. class B extends A { 7. public String toString () { 8. return super.toString() + “3”; 9. } 10. } 11. public class Test { 12. public static void main(String[]args) { 13. System.out.printIn(new B()); 14. } 15. } What is the result?() [" Compilation succeeds and 4 is printed."," Compilation succeeds and 43 is printed."," An error on line 9 causes compilation to fail."," An error on line 14 causes compilation to fail."," Compilation succeeds but an exception is thrown at line 9."]
所谓观察学习,亦称为替代学习,即学习者通过()及其强化性结果的观察而习得()的过程。这种学习不需要学习者直接地做出反应,也不需要亲自体验强化,只要通过观察他人在一定环境中的行为,观察他人所接受的强化就能完成学习。因此,通过这种方式完成的学习又称为“无尝试学习”。
小卫星
衡量社会收入分配平均程度的曲线称为()曲线,根据这种曲线计算出的反映社会收入分配平等程度的指标是()。