A library is an institution that collects, sorts out and collects books and materials for people to read and refer to. As early as 3000 BC, libraries appeared. Library has the functions of preserving human cultural heritage, developing information resources and participating in social education. According to the library in the dictionary, the word "library" first appeared in Japanese literature in 1877. However, it first appeared in China literature. When an article about building a simple library in the 62nd issue of Education World was pushed, it was 1894. The earliest provincial library in China is Hubei Library, which was founded in 1904.

The vowel letter I is pronounced in the stressed opening syllable. Diphthongs /a? The sound of/consists of two sounds. The first sound is the vowel /a/. When pronouncing, the tip of the tongue is close to the lower teeth, and the gum ratio is a/? /A little bigger, fully open, from the first vowel /a/ to the second vowel/? /sliding, the tongue position is from low to high, the mouth shape is from big to small, the volume is from strong to weak, from long to short, from clear to fuzzy, and the two sounds are combined into a diphthongs, such as:

Tiger tiger

China, China

Friday. Friday

Permit license

Pilot. Pilot.

Triangle triangle

teeny

Violin violin

I hope it can help you solve the problem.