节日是传统的庆祝或祭祀的日子。下列属于我们中 * * 传统节日的是[ ]
①春节
②中秋节
③元宵节
④端午节
A.①②③
B.②③④
C.①②④
D.①②③④
答案:D
I can't go to the theater tonight because I ____ my ticket. [ ]
A. have lost
B. had lost
C. will lose
D. was losing
连续移动数控机床进给轴倍率旋钮必须选择为什么状态?