（）指的是引导学生主动投入学习，并且能够适应学生个别差异的教与学的模式和方法。
A.个别化教学
B.过程技术
C.集体教学
D.自主学习
参考答案：B
They ____ on the program for almost one week before I joined them,and now we ____ on it but no good results have come out so far. [ ]
A. had been working; are still working
B. had worked;were still working
C. have been working;have worked
D. have worked; are still working
关于X线照片质量客观评价方法的叙述，中英文对照错误的是()
A．MTF——调制传递函数
B．LSF——点扩散函数
C．WS——维纳频谱
D．ACF——自相关函数
E．DQE——量子检出效率
