明朝时茅元仪编纂的军事百科全书性著作是（）。
A.《军志》
B.《武经总要》
C.《武备志》
D.《军政》
参考答案：C
_____ warned of the danger of losing his way in the jungle, he still wanted to have an adventure. [ ]
A. To be
B. Being
C. Having been
D. Having
现浇混凝土矩形截面梁断面尺寸为200mm×400mm受力钢筋配有单排3-22，混凝土用泵送浇筑输送管内径75，则浇筑混凝土所需碎石的最大粒径为（）mm。
A．31.5
B．50
C．27.5
D．25
22，混凝土用泵送浇筑输送管内径