单选题
Which of the following is NOT mentioned as a reason for the Wright brother's success?
A、
They worked very well together.
B、
They both had practical experience building aircraft.
C、
They made extensive tests before they completed the design.
D、
They were well funded.
【正确答案】
D
【答案解析】
[解析] 文中未提是否有雄厚资金支持的问题。
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