各部位析量分寸计测方法，上肢的肘部横纹至腕部（掌面）侧横纹，直度为（）。
A.14寸
B.12寸
C.10寸
D.16寸
参考答案：B
B．玻璃中的气泡看起来特别明亮，是发生了光的全反射
C．障碍物的尺寸比光的波长大得多时，不会发生衍射现象
D．在光的双缝干涉实验中，把入射光由红光改为蓝光，条纹间距将变宽
Programmers test a program by running it to ensure that the (74) are correct and that the program produces the desired outcome. If errors do occur, the programmer must make the appropriate change and recheck the program until it produces the correct results. This (75) is called testing and debugging.
A．commands
B．software
C．instructions
D．measure
