将R1>R2>R3三只电阻串联,接在电压为U的电源上,获得最大功率的电阻是()。A、 发布时间:2017-02-22 19:17 │ 来源:www.tikuol.com 题型:单项选择题 问题: 将R1>R2>R3三只电阻串联,接在电压为U的电源上,获得最大功率的电阻是()。A、R1B、R2C、R3D、三个都一样
题型:单项选择题 在HBV感染的血清流行病学调查中,首选指标是()A.HBsAg,HBcAg,抗-HBeB.HBsAg,HBcAg,HBeAgC.HBsAg,抗-HBc,抗-HBsD.HBcAg,抗-HBc,抗-HBsE.抗-HBe,抗-HBc,抗-HBs 查看答案
题型:单项选择题 In a sales-type lease, a lessor recognizes a gross profit at the inception of the lease equaling the:()A. present value of the minimum lease payments (MLP) less the cost of the leased asset. B. sale price of the leased asset less the present value of the minimum lease payments (MLP). C. present value of interest revenues over the lease period. 查看答案