下面不是英国人发明创造的是[ ]
A.蒸汽机
B.蒸汽轮船
C.火车机车
D.珍妮机
答案:B
Last year, I liked playing volleyball, but now I get used to ______. [ ]
A. going swimming
B. playing guitar
C. listen to music
电能表的基本误差随着负载电流和功率因数变化的关系曲线称为电能表的特性曲线。