Henry looked over and found there was a well-dressed woman.
A:woman who had much money
B:woman who wore fashionable clothes
C:woman who was very beautiful
截面积为0.2m2的100匝圆形线圈A处在匀强磁场中,磁场方向垂直线圈平面向里,如图所示,磁感应强度正按 △B△t =0.02T/s的规律均匀减小,开始时S未闭合.R1=4Ω,R2=6Ω,C=30µF,线圈内阻不计.求:
在下图所示的电路中,闭合开关后,电压表V2的示数为2.8V,则电压表V1表的示数为____ V,电压表V表的示数为____ V,电源电压为____ V。
——I called you yesterday but you weren't at home.——I ______ flowers in my garden at that time.
下列实验操作中,正确的是 ( )