题干
—Mum, can I listen to music while doing homework?
— Don’t even think about it._____.
— Don’t even think about it._____.
A：The more you get, the more you want
B：Eye for eye and tooth for tooth.
C：A man cannot whistle and drink at the same time.
D：A bad beginning makes a bad ending
答案(点此获取答案解析）
C
磁场在金属球表面产生涡流，涡流与磁场作用形成磁力，从而实现地球仪的悬空静止。地球仪悬空静止的原因是（ ）
