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【判断题】
美食鉴赏,对美食的主观评鉴过程,不属于审美活动的范畴。
A.
正确
B.
错误
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【单选题】框架梁KL2的截面尺寸为300mm×800mm,跨中截面底部纵向钢筋为4 25。已知该截面处由永久荷载和可变荷载产生的弯矩标准值MDK、MLK,分别为250kN.m、100kN.m。试问,该梁跨中截面考虑荷载长期作用影响的最大裂缝宽度w2max(mm)与下列何项数值最为接近? 提示:cs=30mm,h0=755mm。
A.
0.25
B.
0.29
C.
0.32
D.
0.37
【简答题】A.Moveable metal type began to be used in printing. B.Chinese printing technology was first introduced. C.The earliest known book was published. D.Metal type was imported from Korea.
【多选题】在线电压UL =220V,频率 f =50Hz的三相电源上,接一个对称三角形联结的感性负载,已知每相阻抗Zp =8 Ω,则以下参数正确的是()
A.
Ip= 27.5A
B.
Ip= 47.5A
C.
IL= 27.6A
D.
IL= 47.6A
【简答题】function y=two_min(x) if x<20 y=-exp(-(x/20).^2); else y=-exp(-1)+(x-20)*(x-22); end
【单选题】The young inventor wants to take out a ________ on his new type of printing machine.
A.
privilege
B.
precaution
C.
patent
D.
monopoly
【简答题】What are the advantages of movable type printing?
【简答题】已知某混凝土单筋矩形截面梁截面尺寸为b×h=250mm×450mm,安全等级为二级,环境类别为一类,混凝土强度等级为C30,配置HRB335级纵向受拉钢筋4 20( =1256mm 2 ), =35mm。求该梁所能承受的极限弯矩设计值 ?
【单选题】Which type of printing is more convenient based on the passage()
A.
Movable type.
B.
Baked clay.
C.
Block printing.
D.
Wet ink.
【简答题】invented the art of printing(movable type printing) in the Northern Song Dynasty.
【简答题】三相对称感性负载三角形( D )联结,三相对称电源的线电压为 220V ,测得电路的线电流为 38A ,负载的有功功率为 11.583kW 。试求: 1 电路的功率因数; 2 确定负载的电阻值; 3 确定负载的电抗值。
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