对抗渗混凝土试块,同一混凝土强度等级,同一抗渗等级,同一配合比。同种原材料,每单位工程不少于()。
A、一组
B、二组
C、三组
D、四组
参考答案:B
When he left _____school, he got a job as _____secretary in a food company.
A.the; a
B.the; the
C./; a
D./; the
The Zaxon Company produces one product and labor is the only variable resource in the production process. In the short run, Zaxon faces a horizontal demand curve at $20 per unit. The average product of labor in the short run is given in the following table:
A.Resouce Units
B.Average Product of Labor
C.1
D.25
E.2
F.22.5
G.3
H.20
I.4
J.17.5