沉淀反应中抗原过量的现象称为()
A.带现象
B.前带
C.后带
D.等价带
E.拖尾现象
参考答案:C
The bedroom is so dirty. Would you please help me to _____ it clean? [ ]
A. tidy
B. let
C. leave
D. make
信用风险是指因市场价格的不利变动而使银行表内和表外业务发生损失的风险。()