第二炮兵是直接由中央军委领导指挥的,其作战行动必须由军委批准。
参考答案:对
---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