不可用碱提取酸沉淀法提取的是（）
A.芦丁
B.橙皮苷
C.黄芩苷
D.甘草酸
E.葛根素
参考答案：E
-----Shall I take you to the shopping mall after work?
----No ,thanks. My father said he would ______ there on his way home.
A．look for me
B．pick me up
C．let me down
D．take after me
可以同时在银行间市场和交易所市场进行交易的债券品种是（）。
A.央票
B.企业债
C.公司债
D.政策性金融债
