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【单选题】

The wheel is important because _______.
A、it was man’s first real invention
B、all transportation depends on it
C、every machine depends on it
D、both
B、andC

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根据网考网移动考试中心的统计，该试题：

4%的考友选择了A选项

0%的考友选择了B选项

8%的考友选择了C选项

88%的考友选择了D选项

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