多线程是Java程序的______机制，它能同步共享数据，处理不同的事件。
参考答案：并发
----Young people shouldn’t always change their jobs.
-----_____________. Young people should seek for more challenges.
A．It’s all the same to me.
B．You have a point there.
C．That’s not the way I see it.
D．I believe so.
简述柳宗元的社会思想。
