第1个回答 2016-02-15
part of和a part of都表示“什么什么的一部分”,区别在于:a part of前面加了不定冠词a,更加强调“一部分”的概念。如:
John gave several reasons, only a part of which were valid.
I have 21 customers, part of whom are fathers.
The teacher discussed Jim, part of whose problems was poor study habits.