Thank you for giving me a hand, I ____ in the experiment without your valuable help.
A. had failed
B. will fail
C. would have failed
D. must have failed
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If I ____ harder at school, I would be sitting in a comfortable office now.(2002.12.CET-4)
A. worked
B. were to work
C. had worked
D. were working
如果是浓雾天,驾驶员除了()外几乎不能分辨其他颜色。
A. 绿色
B. 蓝色
C. 红色
D. 黄色
美国的威廉·哈顿(William Haddon)将人、车、路在交通事故中的相关关系用矩阵形式表示,称为著名的( )。
A. 波士顿矩阵
B. 威廉矩阵
C. 哈顿矩阵
D. 交通流理论
以下哪些方法或措施可减少或避免眩目现象,在一定程度上减少了由于眩目而造成的交通事故。()
A. 道路中间隔离带上植树
B. 设置防眩护栏
C. 提高路灯的亮度
D. 调节前灯位置