在公開考試中考生可否用擦得甩既原子筆?

1.You can use, but it will lose it colour quickly, then the teacher will give you no marks for every unclear answer, I recommend you to use ordinary ball pen, it's
better than 擦得甩既原子筆.
2.about $18, quite expensive

can use,but i am no dnot know you use this pen write the exmier can see your write the things clearly or no.i am no living in 屯門,i donot know the pen how much is it.