—You must be kidding. I felt _______ among those successful people.
A:confident; out of
B:nervous; out of shape
C:relaxed; out of place
已知线段a=2,b=4,则线段a,b的比例中项为( )
果你有一个苹果,我有一个苹果,彼此交换,我们每个人仍只有一个苹果;如果你有一种思想,我有一种思想,彼此交换,我们每个人就有了两种思想。”萧伯纳的这句话说明我们应( )