单选题 · 选择一个答案
What is the maximum speed limit for an ordinary heavy truck, subject to any lower posted limit?
服从更低道路限速的前提下，普通重型卡车的最高限速是多少？
An ordinary heavy truck has a maximum speed limit of 90 km/h.
普通重型卡车最高限速为每小时90公里。
阅读相关知识
Observe any lower posted limit. Weather, road conditions, load and visibility may require a lower safe speed; 90 km/h is not permission to use that speed everywhere.
道路标示限速较低时服从较低值；天气、路况、载重及视距还可能要求更慢。90公里不是在所有路段都可行驶的许可。