下列岩石中,都属于变质岩的一组是[ ]
A.砂岩、砾岩、流纹岩
B.板岩、砾岩、页岩
C.大理岩、石英岩、片麻岩
D.石灰岩、安山岩、花岗岩
答案:C
I think the director's attitude___ this program will decide what we should do next. [ ]
A. for
B. of
C. at
D. towards
修理尺寸法的使用要点是什么?