【单选题】交流工频电压314V,其负载为 1H 的电感,则通过的电感的电流为 A。
【单选题】A firm has $350 million in revenues and explicit costs of $150 million. If its owners have invested $150 million in the company at an opportunity cost of 10 percent a year, the firm's economic profit ...
【单选题】工频交流电压314V,其负载为1H的电感,则通过电感原件的电流为( )A,该电路的ω为( ) A、 1 B、 2 C、 3 D、 0
【简答题】交流工频电压 314V ,其负载为 1H 的电感,则通过的电感的电流的有效值等于多少?
【多选题】在中国封建社会的历史上出现过一些“盛世”,如()。
【判断题】刚体做平动时,任意两点具有相等的速度和加速度。
【单选题】工频交流电压314V,其负载为1H的电感,则通过电感原件的电流为()A
【判断题】刚体做平动时,任意两点具有相等的速度和加速度。
【单选题】Which of the following statements is false? An economic ysis of carbon taxes can:
A.
calculate the increase in costs faced by coal-using industries.
B.
predict the effect on unemployment in West Virginia coal mining communities.
C.
compare the likely reductions in medical expenditures on diseases caused by smog.
D.
present a trade-off of the costs and benefits of different levels of carbon taxes.
E.
conclude that such taxes should be imposed to benefit future generations.