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【单选题】
A profit maximizing dairy farm is currently producing 10,000 gallons of milk per day. The government is considering two alternative policies. One is to give the farm a lump sum subsidy of $500 per month. The other policy is to give the farm a subsidy of $0.05 per gallon of output.A.
Both kinds of subsidy will increase production at this farm
B.
Neither subsidy will aect production at this farm, since output is determined by profit maximization.
C.
Production at this farm will be increased if the per unit subsidy is adopted, but not if the lump-sum subsidy is adopted.
D.
Which subsidy has the greater eect on production at this farm depends on whether fixed costs are greater than variable costs.
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【单选题】设有以下定义语句,按在内存中的存放顺序, a 数组的第 10 个元素是 int a[3][6];
A.
a[0][4]
B.
a[1][3]
C.
a[0][3]
D.
a[1][4]
【单选题】题5～6：某网状配筋砖柱轴心受压构件，截面尺寸490mm×490mm，构件计算高度H0=4900mm。采用MU10级烧结普通砖、M7.5级水泥砂浆砌筑，砌体施工质量控制等级为B级。钢筋网采用冷拔低碳钢丝中φb4制作，其抗拉强度设计值fy=430MPa，As=12.6mm2；钢筋网竖向间距sn=240mm，水平间距为@60×60。 试问，该配筋砖柱的轴心受压抗压强度设计值fn(MPa)，应与下列何项...
A.
2.
B.
2.81
C.
3.03
D.
3.20
【单选题】. 水流的两个截面面积为w,下列方程中不属于恒定流连续方程的是( )。
A.
Q1=Q2；
B.
w1v1=w2v2；
C.
v1/v2=w2/w1；
D.
Z1+P1/γ+α1v12/2g=Z2+P2/γ+α2v22/2g+hw1-2。
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