你申请了实验室助理这个职位，对吧？
You have applied for the laboratory assistant's position，right?

For example:
A: You have applied for the laboratory assistants position, right?
你申请了实验室助理这个职位,对吧？
B: Yes. When I saw the advertisement I thought it would really suit me.
是的。当我看到广告时，我想这个职位非常适合我。

你知道作为一个实验室助理具体做些什么吗？
Do you know exactly what you would be doing as a laboratory assistant?
Do you know exactly what your duties would be as a laboratory assistant?
Do you know exactly what your responsibilities would be as a laboratory assistant?

For example:
A: Do you know exactly what you would be doing as a laboratory assistant?
你知道作为一个实验室助理具体做些什么吗？
B: A laboratory assistant helps to maintain scientific equipment, keep a check on the supplies in the store, and prepare the chemicals for experiments.
实验室助理就是要维护科研设备，经常检查库房的供应以及为化学实 验做准备工作。

你对物理实验熟悉吗？
Have you any experience with physic experiment?

For example:
A: Have you any experience with physic experiment?
你对物理实验熟悉吗？
B: I've done some physic experiment in the physics course.
我在物理课中做过一些物理实验。