问题
选择题
关于电磁感应现象的讨论，下列说法正确的是[ ]
A、电能生磁，磁不能生电
B、发电机发电的过程能量不会转化
C、在电磁感应现象中产生的电流叫感应电流
D、导体在磁场中往复运动产生的电流方向不变
答案
答案：C
搜题请搜索小程序“爱下问搜题”
关于电磁感应现象的讨论，下列说法正确的是[ ]
A、电能生磁，磁不能生电
B、发电机发电的过程能量不会转化
C、在电磁感应现象中产生的电流叫感应电流
D、导体在磁场中往复运动产生的电流方向不变
答案：C
Questions 23-30
· You will hear people from the National Food Council complaining to retailers about the high prices they are charging for food products and household goods. They complain that the shops have marked up wholesale prices far too much.
· For each question (23-30), mark one letter (A, B or C) for the correct answer.
· After you have listened once, replay the recording.
Extra land has been bought in order to
A．
| A. provide good car parks. |
B．
| B. show a large range of goods. |
C．
| C. help farmers to grow more food. |