计算机硬件故障是一种最常见的故障，是由于设备的安装、设置不当而引发的故障。
参考答案：错
-Got your driving license?
-No. I ___ too busy to have enough practice, so I didn’t take the driving test last week. I am going to next
week. [ ]
A.was
B.have been
C.am
D.had been
试论可持续发展的基本要求及其对立法的指导意义。
