下列城市属于唐朝后期全国最繁华的工商业城市是()
A.长安
B.宣州
C.扬州
D.益州
参考答案:C
This morning I found red wallet on the campus. Girls usual like red, so I believed the wallet was belonged to a girl student. I opened it, try to find out whose it was. Therefore, I found nothing but 300 yuan in it. I was wondering what to do with it while suddenly my classmates Chen Yang passed by. She suggested she put up a Lost and Found notice and I did so. I wrote down my telephone number and ask the owner to call me after she saw it. Later, a girl came to claim it on 3 o’clock this afternoon.
下面关于计算机病毒的叙述中,不正确的是______。
A.计算机病毒有破坏性,凡是软件作用到的计算机资源,都可能受到病毒的破坏
B.计算机病毒有潜伏性,它可能有长期潜伏在合法的程序中,遇到—定条件才开始进行破坏活动
C.计算机病毒有传染性,它能不断扩散,这是计算机病毒最可怕的特性
D.计算机病毒是开发程序时未经测试而附带的—种寄生性程序,它能在计算机系统中存在和传播