2. 外语
  3. The wheel is important because ______. This passage says that the first wheel may have been a ______.

The wheel is important because ______. This passage says that the first wheel may have been a ______.

admin2009-09-17  52
问题 The wheel is important because ______.
This passage says that the first wheel may have been a ______.
选项 A、heavy log
B、piece of metal
C、piece of log
答案C
解析 这个题需要分析，从第三段可知，首先当时的车轮没有金属，同时很轻易于操控，由此得出答案C是正确答案。
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