两广总督李侍尧在乾隆二十四年（1759年）的奏折中说：“外洋各国夷船到粤，贩运出口货物，均以丝货为重，……统计所买丝货，一岁之中，价值七八十万两（白银），或百余万两。……其货物均系江浙等省商民贩运来粤，转售外夷，载运回国。”对此理解正确的是（    ）

①广州是当时官方指定的对外贸易港口②丝绸是中国的一种主要的出口货物

③区域闻长途贩运贸易非常兴盛④外商贸易瓦解了中国朝贡贸易体系

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    I'm Lucy. There are four people in my family. They are my grandfather, my parents and me. My grandfather likes to plant flowers. He works on his farm every morning. My father likes to watch TV. He likes to watch the news very much. My mother likes to go shopping. She often buys new clothes for us. I like to read books. I go to the library on Sundays.