---Don’t you think that funny Johnson is really ______ failure?

---But ______ book he wrote is very popular with teenagers.

A．/, a

B．the, the

C．an, the

D．a, the

无筋砌体结构受压构件的承载力设计表达式N≤φfA，其中系数φ主要考虑的因素是( )。

A．构件高厚比的影响
B．考虑人为因素和施工偏差
C．考虑高厚比β和轴向力的偏心距e对受压构件强度的影响
D．综合考虑了所有对砌体受压承载力的影响因素