图4资料取自于二战期间一份重要的文件,对此文件理解正确的是
①这份文件的名称是《联合国家宣言》
②文件中的台湾被日本所窃源于甲午战争
③该文件标志世界反法西斯同盟正式建立
④文件签署有利于中国抗日战争取得胜利
A:①②
B:②③
C:③④
D:②④
A.电源(电动势3V,内阻约1Ω)
B.电流表(0~0.6A,内阻约1Ω)
C.电流表(0~2A,内阻约0.4Ω)
D.电压表(0~3V,内阻约10kΩ)
E.电压表(0~10V,内阻约20kΩ)
F.滑动变阻器(0~5Ω,额定电流3A)
G.滑动变阻器(0~500Ω,额定电流2A)H.开关、导线
How would you like if you were watching your favorite TV program and someone came into the room and just shut it off without asking you?