In 1970, if the cost to produce one widget was $0.07, what would have been the total cost
A. $1,540
B. $14,000
C. $20,650
D. $22,750
E. $34,300
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如图某一滑动面为折线形的均质滑坡,其主轴断面及作用力参数如表所示,则该滑坡的稳定性系数Fs最接近()。 滑块编号 下滑力Ti/(kN/m) 抗滑力Ri/(kN/m) 传递系数Ψj
① 3.5×104 0.9×104 0.756
② 9.3×104 8.0×104 0.947
③ 1.0×104 2.8×104
A. 0.80
B. 0.85
C. 0.90
D. 0.95
某建筑场地抗震设防烈度为7度,设计基本地震加速度为0.15g,设计地震分组为第二组,地下水位埋深2.0m,未打桩前的液化判别等级如下表,采用打入式混凝土预制桩,桩截面为400mm×400mm,桩长ι=15m,桩间距s=1.6m,桩数20×20根,置换率ρ=0.063,则打桩后液化指数由原来的12.9降为()。
A. 2.7
B. 4.5
C. 6.8
D. 8.0
某场地为均质黏性土场地,在2.0m处进行平板荷载试验,试验资料如下表所示;
载荷板为0.5m2的圆形载荷板,该试验点的承载力特征值最接近()。(注:压力加至 450kPa后,24小时内沉降速率不能达到稳定)
A. 175 kPa
B. 210kPa
C. 250kPa
D. 330kPa
The percent decrease in average number of production hours per widget from 1990 to 2000 was approximately
A. 44%
B. 36%
C. 34%
D. 32%
E. 27%