35+58-1
=4940-1，
=940；
答：玩具厂全月超额完成计划940．
—______ two little boys behind the trees?
—No, ______. [ ]
A. Is there; there is
B. There isn't; there are
C. Are there; there aren't
D. There aren't; there aren't
磨削的加工精度是指零件加工后包括L：（）三个方面与理想零件的符合程度。
A、尺寸精度；
B、形状精度；
C、位置精度；
D、表面粗糙度；
