一般在中硬和坚硬岩层中设置炮眼，当设计循环进尺为( )m左右时，采用双空孔形式最佳。
A．2.0
B．2.5
C．3.0
D．3.5
参考答案：D
荷载分项系数等于荷载设计值与荷载标准值之间的比值，当恒荷载的荷载效应对结构不利但为活荷载效应控制时，即通常遇到的情况，取恒荷载分项系数γG=______，在一般情况下，活荷载的分项系数γQ=______，当工业建筑楼面活荷载标准值＞4kN/m2时，取γQ=______。
We couldn't trust her for she is always____. Look, she ____ some eggs on the table and said
these newly- ____ eggs were her own. In fact they were her neighbor's. [ ]
A. lying; lay; laid
B. laying; lied; lain
C. lying; laid; laid
D. laying; lay; lain
