C. ⑤②④③①
D. ⑤④②③①
D 学科融合
If we know an object's distance(距离) and its time, we can find out more information about the object. For example, we can find out its speed. Speed is the distance an object travels in a certain amount of time. When we talk about speed, we are talking about the relationship between distance and time.
Speed is important in our everyday life. We can see some signs of speed limits in streets. In the UK, the unit of time for cars are given in miles per hour. The miles tell you the distance, and the hour is the unit of time. Speed limits often change. That depends on where you are driving. Driving cars near schools must go at a slower speed.
When we compare two objects travelling the same distance, we usually see which one finishes first. That is the one with greater speed. Suppose a tortoise and a hare could both run a 5-metre race. Which one would win? The hare has greater speed, so it would finish first.
We can also look at speed another way. We can compare two objects that are travelling for the same amount of time. We look to see which one goes farther in that time. The one that travels farther has higher speed. Suppose a hare races against a cheetah(猎豹). If the hare and the cheetah run for an hour, the cheetah will run farther because it has higher speed.
()29. If a car's speed is 100 miles per hour and it runs for half an hour, the distance it travels is .
A. 50 miles
B. 80 miles
C. 100 miles
D. 150 miles
()30. How many kinds of animals are mentioned in the passage?
A. Two.
B. Three.
C. Four.
D. Five.
()31. Why does the writer mention the tortoise and the hare in Paragraph 3?
A. Because both of them are used from the same fairy tale.
B. Because they are used to explain speed, time and distance.
C. Because the tortoise runs slowly but wins the running race.
D. Because the hare is the fastest and the tortoise is the slowest.
()32. If two objects are travelling for the same amount of time, the object with lower speed will .
A. run farther
B. run higher
C. run nearer
D. run faster
()33. In which unit of a textbook can the passage be found?
A. Unit 1 Amazing Animals.
B. Unit 2 Chemistry Lessons.
C. Unit 3 The Value of Time.
D. Unit 4 The World of Physics.

29—33. ABBCD
D篇
本文是一篇科普说明文，介绍了“速度”的定义(物体在一定时间内移动的距离)，并通过“龟兔赛跑”“野兔与猎豹竞速”的例子，讲解了速度、时间与距离的关系，同时提到速度在日常生活(如限速标志)中的应用。
第31题:推理判断题
解析:第三段提到龟兔赛跑，是为了举例说明“相同距离下，速度更快的物体先到达终点”，核心是解释“速度、时间与距离的关系”，而非故事本身的寓意，要考虑文章的科普目的。
答案:B
第32题:细节理解题
解析:根据文中“We can compare two objects that are travelling for the same amount of time. We look to see which one goes farther in that time. The one that travels farther has higher speed”，可知“相同时间内，速度越低的物体移动距离越近”。
答案:C

【分析】
本题为英语阅读理解题，共5道小题，涵盖细节理解与推理判断。解题思路：1. 通读全文，明确文章核心是讲解速度、时间、距离的关系及实际应用；2. 针对每道题，定位原文对应段落或关键语句，提取核心信息；3. 结合题干要求分析选项，排除干扰项，选出正确答案。
【解析】
29题：根据文中对速度的定义“Speed is the distance an object travels in a certain amount of time”，可得公式：距离=速度×时间。题干中速度为100英里/小时，时间为0.5小时，计算得100×0.5=50英里，对应选项A。
30题：文中明确提到的动物有tortoise（乌龟）、hare（野兔）、cheetah（猎豹），共3种，对应选项B。
31题：第三段以龟兔赛跑为例，目的是说明“相同距离下，速度更快的物体先到达终点”，即解释速度、时间与距离的关系，而非故事本身寓意，对应选项B。
32题：根据文中“相同时间内，移动更远的物体速度更高”，可推知相同时间内，速度越低的物体移动距离越近，对应选项C。
33题：文章核心讲解物理概念“速度”，因此最可能出现在物理相关单元，对应选项D。
【答案】
ABBCD
【知识点】
英语阅读理解、细节理解、推理判断
【点评】
本文为科普类英语阅读，围绕速度、时间、距离的关系展开，题目侧重考查对文章细节的定位与理解，难度适中，学生通过定位原文信息即可解题。
【难度系数】
0.7