She parked her car outside the window _______, but the next morning she found it missing. A.as usualB.at leastC.so farD.at all 答案:A解析:略
(2005大连物理竞赛题)小明家中的几盏亮着的电灯突然全部熄灭了,检查保险丝并未烧断,用测电笔测试插座的两孔时,氖管都发光。以下对故障的判断正确的是[ ] A.灯泡全部烧坏 B.进户零线断路 C.室内线路发生短路 D.进户火线断路