Để phân biệt các dung dịch riêng biệt: anilin, glucozơ và alanin, ta dùng dung dịch nào sau đây:

A. AgNO₃/NH₃ 

B. NaOH

C. Br₂

D. HCl

In my future home there are many modern appliances such as: smart phones, automatic dishwashers, robots, modern refrigerators ..... but in my most favorite is the current refrigerator long.
My fridge will collect data on quality, quantity, expiration dates and even recipes for the products you will have in your fridge. My refrigerator will be able to through a unique touch screen showing you what's inside your refrigerator without opening it.
Additional information such as shopping facilities or a sign for the lost grocery store will be just a fingertip away. To see if this idea worked and also to spot the problem, the designer built a prototype to test the concept on a functional refrigerator, capable of displaying and handling an operational process.