下列哪个因素是动态衡量专业技术人员素质高低的真正尺度?() ["知学","学习力","好学","乐学"]
1. public class Blip { 2. protected int blipvert(int x) { return 0; } 3. } 4. class Vert extends Blip { 5. // insert code here 6. } Which five methods, inserted independently at line 5, will compile?() [" public int blipvert(int x) { return 0; }"," private int blipvert(int x) { return 0; }"," private int blipvert(long x) { return 0; }"," protected long blipvert(int x, int y) { return 0; }"," protected int blipvert(long x) { return 0; }"," protected long blipvert(long x) { return 0; }","protected long blipvert(int x) { return 0; }"]
目前B-ISDN采用的传输模式主要有()。 ["高速分组交换","高速电路交换","异步传输模式","光电交换模式","同步传输模式","匀速电路交换"]
C4植物的重要生理特性是:
体育评价应实现多样化,将定量分析和定性分析相结合。
请论述曝气池中的泡沫种类,及各自的特点。