某烃类化合物A的质谱图表明其相对分子质量为84，红外光谱表明分子中含有碳碳双键，核磁共振谱表明分子内所有氢原子都处于相同的化学环境，由此推测

    I come from Singapore. Singapore is a lovely country. It is small in size, but large in fun. Do you know Singapore is called the"Garden Country"? There are so many trees and flowers in my country.

Hainan chicken rice

    Hainan chicken rice is popular in Singapore. Do you know it came from Hainan in China? In the 1920s, a Chinese man named Mo Lurui came to Singapore from Hainan. He made chicken rice for a living. You can find Hainan chicken rice in most restaurants in Singapore.

The musical fountain(喷泉)

    The Fountain of Wealth in Singapore is one of the largest fountains in the world. It's a musical fountain. Usually, there are musical fountain shows at night. The water from the fountain can reach thirty metres high.

Good habits

    Singapore has different kinds of laws. People have good habits to keep our country clean. Chewing gum(口香糖)is not allowed(允许)in Singapore.

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