第1题
悬式绝缘子安装时的要求是()。
A.安装应牢固、连接可靠、防止积水
B.安装时应清除表面的污垢、附着物及不应有的涂料
C.与电杆、导线金具连接处无卡压现象
D.悬垂串上的弹簧销子、螺栓及穿钉应向送电侧穿入,两边线应由外向内,中线应由左向右(面向受电侧)或统一方向穿入
E.耐张串上的弹簧销子、螺栓及穿钉应由上向下穿,当有特殊闲难时,可由内向外或由左向右(面向受电侧)或统一方向穿入。
第2题
电杆组装以螺栓连接的构件如必须加垫片时,每端垫片不应超过()个。
A.1
B.2
C.3
D.4。
第3题
拔梢水泥杆的重心位置,在距小头约占电杆全长的()倍。
A.0.37
B.0.44
C.0.56
D.0.63。
第4题
rms is best explained by the fact that:
A.the profit maximizing output level for monopolists occurs at lower levels of production than for purely competitive firms
B.monopolists maximize profits by setting output such that marginal revenue exceeds marginal cost
C.monopolists maximize profits by setting output such that marginal revenue is maximized
第5题
$600/ton. If the firm is minimizing the cost of resources, it is least likely that the:
A.marginal product per unit of labor is 1/3 ton.
B.marginal revenue product of capital is equal to the price of a unit of capital.
C.ratio of the marginal output per labor unit to labor units employed is at a maximum.
第6题
00 - 5 x price. With respect to equilibrium price and quantity, there is:
A.no market equilibrium.
B.a stable market equilibrium.
C.an unstable market equilibrium.
第7题
按发卡对象不同,可分为()。
A.金卡和普卡
B.贷记卡和准贷记卡
C.单位卡和个人卡
D.专用卡和联名卡
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