砂石骨料生产的一般过程有（）
A.开采、破碎、储存、运输
B.开采、加工、储存、运输
C.开采、筛分、储存、运输
D.开采、冲洗、储存、运输
参考答案：B
在△ABC中，AB=AC，AB的垂直平分线于AC边所在直线相交所得锐角为50°，求底角∠B的大小．
Peter as well as his parents _____ going to attend our party tomorrow. [ ]
A. is
B. are
C. was
D. were
