How many kinds of instruments are there in the ad?翻译

问题描述:

How many kinds of instruments are there in the ad?翻译

广告中有多少种乐器?

instruments
n.仪器;手段,工具;乐器;法律文件
How many kinds of instruments are there in the ad?
这个广告中有多少种乐器/仪器?