问题
单项选择题
隧道设计中规定,行驶车辆在长(或特长)隧道内出现车龙,当交通阻滞长度大于()m时,必须采取交通管制措施,预防当发生交通事故时出现重大伤亡事故。
A、500m
B、800m
C、1000m
D、300m
答案
参考答案:C
隧道设计中规定,行驶车辆在长(或特长)隧道内出现车龙,当交通阻滞长度大于()m时,必须采取交通管制措施,预防当发生交通事故时出现重大伤亡事故。
A、500m
B、800m
C、1000m
D、300m
参考答案:C
根据短文内容,用方框中所给单词的适当形式填空,每词限用一次。
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