AMC 8 1990 Problem 23

AMC8 1990 年第 23 题

行程问题★★★☆☆

Problem The graph relates the distance traveled [in miles] to the time elapsed [in hours] on a trip taken by an experimental airplane. During which hour was the average speed of this airplane the largest?

该图显示了一架实验飞机在一次飞行中已行驶距离[英里]与已用时间[小时]的关系。在哪一个小时中该飞机的平均速度最大？

A. $\text{first (0-1)}$
B. $\text{second (1-2)}$
C. $\text{third (2-3)}$
D. $\text{ninth (8-9)}$
E. $\text{last (11-12)}$

正确答案 · Correct Answer

B

解析 · Solution

解析整理中

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