经济计量法是哪一类分析与数学方法相结合的一种预测方法？（）
A.矩阵分析
B.经济分析
C.因果关系分析
D.判断分析
参考答案：A
I searched the website. Unfortunately, the movie that I had seen many times was no longer _____. [ ]
A. valuable
B. reliable
C. available
D. incredible
卧式镗床有振动时，会使镗削工件表面产生波纹。
