离子交换色谱
参考答案:
利用离子交换剂为固定相,根据荷电溶质与离子交换剂之间静电相互作用力的差别进行溶质分离的洗脱色谱法。
Your customer asks your bank to handle a collection outwards on his behalf. Your bank is()
A.the reimbursing bank
B.the negotiating bank
C.the remitting bank
D.the collecting bank
11,17,(),31,41,47
A.19
B.23
C.27
D.29