appear to do和seem to do可以互换吗？

选C.都可以
appear
to
do和seem
to
do可以互换。
英汉词典对seem
的解释之一是：
seem:
appear
to
be
somthing.
这也是词典的解释：
★seem
和
appear
在应用上常无差别，但前者似可导致某种结论，后者仅仅显示某一客观现象：He
seems
to
be
sick,
for
he
appears
pale.
-er

扩展阅读：appear to be doing ... appear to sb ... appear ready to do ... argue sb into doing ... appear to do something ... appear doing还是to do ... appeal to sb to do ... appeal to doing用法 ... be aimed to do ...