这次课程改革倡导为每一个学生的发展提供多样化的学习评价方式，强化评价的（）功能。
A.实效
B.发展功能
C.诊断
D.激励
参考答案：A, B
溢流阀阻尼孔被堵塞使液压牛头刨床空运转时液压系统中压力（）。
A、超高
B、超低
C、过低
D、过高
Yesterday Frank worked deep into the night, this is the second time this week he's stayed up, ____ ? [ ]
A. didn't he
B. isn't it
C. isn't this
D. hasn't he
