Углеводороды. Строение. Свойства.

Ребята, я Вам предлагаю сделать тест на закрепление по пройденному материалу на тему : "Углеводороды. Строение. Свойства"
    This is a required question
    This is a required question
    This is a required question
    This is a required question
    This is a required question
    This is a required question
    This is a required question
    This is a required question
    This is a required question
    This is a required question
    This is a required question
    This is a required question
    This is a required question
    This is a required question