微机经常出现蓝屏死机故障,可能的原因有()。
A.主板与声卡的驱动程序不兼容
B.微机感染病毒
C.CPU没有安装好
D.CPU风扇出现故障,使CPU温度过高
参考答案:B, D
用所给单词的正确形式填空:
1. There are four ________ (tomato) in the drawer.
2. Jeff likes _______ (strawberry) very much.
3. Are these _________ (you)oranges?
4. Sonia _______ (have) a sports collection.
5. She _______(like) bananas.
6. I _______( not like) math.
7. She ________(play) sports every day.
某CRT显示器可显示64种ASCII字符,每帧可显示72字×24排;每个字符字形采用7×8点阵,即横向7点,字间间隔1点,纵向8点,排间间隔6点;帧频50Hz,采取逐行扫描方式。假设不考虑屏幕四边的失真问题,且行回扫和帧回扫均占扫描时间的20%,问:
显存中存放的是哪种信息?