立铣刀主要用于加工沟槽、台阶和()等。
A、内孔
B、平面
C、螺纹
D、曲面
参考答案:D
总体规划的规划期一般为( )。
A.10年
B.8年
C.5年
D.4年
I got to love Hangzhou ______ I went there in 2001 and that was the first time that I ______Longjing TeA.
A.the first time; had tasted
B.for the first time; had tasted
C.the first time; have tasted
D.for the first time; tasted