题目

Travelling is Jane’s favourite. She has been to many places of interest in the world with her family. Last year they went to London.It was an early Friday morning. They took a taxi to the train station and took a train to London. When they arrived in London, they visited the Tower of London, the Tower Bridge, the British Museum and many other places of interest. They enjoyed themselves in London for a week. They had a lot of interesting experiences during the trip. The most interesting one was that they met a parrot in a pet shop. In the pet shop, they saw a parrot with a red string tied (下列化学方程式书写正确的是（　　）A．2H2+O2 点燃 . 2H2OB．4Fe+3O2 点燃 . 2Fe2O3C．Mg+O2 点燃 . MgOD．C+O2=CO2