A:上游
B:中游
C:下游
D:发源地
—First I did my homework, and then I played piano for half hour.
面对问题的失败,不轻言放弃,而是轻松地告诉自己,我又找到一个远离失败接近成功的通道。这体现了自信者 的心理品质。( )