0.0.8_fix_1: Fixed the issue of polyphonic characters in simultaneous practice.

In the on-screen practice of version 0.0.8,

if you select Pinyin or Shuangpin (double Pinyin),

Chinese polyphonic characters may be pronounced incorrectly.

This fix version corrects the pronunciation of a large number of polyphonic characters (mainly concentrated in four-character idioms/classical texts).

Thanks to @橼梓獒祭 for pointing out this issue.