光面爆破时，应尽可能减少周边眼间的起爆时差，相邻光面炮眼的起爆间隔时间不应大于( )
A、200msC
暂无解析
Weaimtoensurethatallcandidatesaretreatedfairlyandthattheyhaveequal______toemploymentopportunities．
设函数，其中n为正整数,则f'(0)=()
求曲线y=x^2与直线y=0，x=1所围成的平面图形绕x轴旋转一周所得旋转体的体积V.
Wewerebusy________(get)thingsreadyforthetrialproductionwhenhephonedus.
heteachertoldthemsincelight________(travel)fasterthansound,lightning________(appear)togobeforethunder.
