The Blacks are English . Now they are in Beijing . This is their first visit to China.
They are going to stay in China for three weeks . They want to learn some Chinese ,too.
He likes driving in Beijing very much .Mrs Blacks is a teacher .She often visits a middle school in Beijing ,and she likes to speak with students.
They take a lot of photos in China .When they are back to English ,They’re going to show the photos to their friends. They want the English People to know more about China.
淀粉等均为家庭厨房中常用的物质，用这些物质能完成的实验是 
②鉴别食盐和小苏打