题目

Parents and kids today dress alike, listen to the same music, and are friends. Is this a good thing? Sometimes, when Mr. Ballmer and his 16-year-old daughter, Elizabeth, listen to rock music together and talk about interests both enjoy, such as pop culture, he remembers his more distant relationship with his parents when he was a teenager. “I would never have said to my mom, ‘Hey, the new Weezer album is really great. How do you like it?’”says Ballmer. “There was just a complete gap in taste.” Music was not gulf. From clothing and hairstyles to activities and expectations, earlier 如图所示电路是接通的，在t1时刻突然断开S，则R1两端电压随时间的变化图线可能是图乙中的（　　）A．B．C．D．