The wheel is important because ______. Which of the following is NOT true?

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问题 The wheel is important because ______.
Which of the following is NOT true?

选项 A、Wheel was man’s first and most important invention in history.
B、Wheels are lighter than logs.
C、Wheels were invented before carts.

答案B

解析 前A、C文中都提到过,B无法确定。
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