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当前学科：中药化学成分与药效物质基础
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槐花为豆科植物槐树的干燥花及花蕾，花部分习称槐花，花蕾部分习称槐米。槐米含有芦丁、槲皮素、皂苷、白桦脂醇、槐二醇以及槐米甲、乙、丙素和黏液质等。芦丁的化学结构类型为（）
A . 黄酮
B . 黄酮醇
C . 二氢黄酮
D . 异黄酮
E . 查尔酮
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Read the following Fax on establishment of business relations and fill in the blanks with the given words and phrases below. such as, set up, as well as, who, opportunities, contact, carry, facilitate, assist, with Foreign Economic Relations & Trade Committee of Dalian City Address: 108 zhongshan Road, Xigang District, Dalian, Liaoning, China. Tel : 8198888 Fax : 8881999 To: Ms Jaana Pekkala, Consultant for China Swiss Organization for Facilitating Investments Fax: +41-1-2493133 Total pages of this fax : 2 Dear Ms Jana Packable, We understand from the Swiss Business Guide for China that your organization is helping Swiss firms in seeking(1)of investing in China and business cooperating with Chinese partners．To establish business relations(2)your organization and attract Swiss companies' investment here in Dalian, We write to introduce our city, the city of Dalian, as one of the open cities in Liaoning Province, China and also ourselves, Foreign Economic Relations & Trade Committee of Dalian, as a Dalian government initiative to(3)business relationship with foreign companies. Our committee provides advice and assistance to Dalian firms seeking to export their services, goods to foreign areas and import goods and services abroad．We also(4)Dalian firms in establishment of joint ventures and(5)the procedures for examination and approval of joint ventures and foreign sole investment firms．Our committee can provide Dalian companies with information on the world market and specific commercial opportunities(6)organize trade missions, seminars and business briefings. Our committee facilitates and encourages investment from other countries into targeted sectors of Dalian economy and maintains active promotion of Dalian through its network of contacts in domestic and abroad areas. Nowadays, we are seeking foreign investment in the field of capital construction,(7)improving of tap water system and highway construction．Also, we are setting up a tannery zone in Tong'erpu, the largest leather clothes producing and wholesaling base in North China．We invite Swiss companies with most favorable polices to(8)their firms in any form on tanning, leather processing and sewage treatment. Any information on investment projects into Dalian and on business cooperation with firms in Dalian is highly appreciated and will be passed on to anyone(9)ave approached us with interest in similar project．You are also invited to our city for investigation and business tour. Should you have any questions, please feel free to(10)us. Thank you for your attention and looking forward to your prompt reply. Sincerely yours, Qiming Di Commercial Assistant For Foreign Economic Relations & Trade Committee of Dalian City
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