题型:判断题 在如图所示的电路中,电源电动势E=3.0 V,内电阻r=1.0 Ω;电阻R1=10 Ω,R2=10 Ω,R3=30 Ω,R4=35 Ω;电容器的电容C=100 μF,电容器原来不带电,求接通开关S后流过R4的总电荷量。 查看答案
题型:判断题 The World Wide Web is the latest evolution of an effort to make information on computers (68) the world available to as many users as possible.A.throughB.throughoutC.byD.with 查看答案