—Have you seen my e-mail about our TESL project?  

— Yes. Luckily I checked my e-mails yesterday. Normally I ______ my e-mail box for days. [ ]

A. don't open        

B. didn't open    

C. hadn't opened      

D. haven't opened

急性肾衰无尿或少尿期血液中（）

A.血钾、磷升高，血钠、钙下降

B.血钾、钙升高，血磷、钙下降

C.钾、钙升高，血钾、磷下降

D.血钾、钙升高，血钠、磷下降

E.钾、磷升高，血钾、磷下降