Đã Đóng

Doubt Solver

1 freelancer đang chào giá trung bình $3333 cho công việc này


Hi there, I am lecturer in chemistry with PhD qualification and have more than 14 years experience of teaching and research at college and university level. I have good command over all types of chemistry syllabus incl Thêm

$3333 USD / giờ
(6 Nhận xét)