She ____________ Lingling. He ____________ Daming. They ____________ friends. [ ]

A. is; is; are

B. are; am; is

C. am; are; is

低血钾的原因除外（）

A.呕吐、腹泻、胃肠引流

B.精神性食欲减退

C.大量利尿

D.肾上腺皮质功能减退

E.静脉滴注大量葡萄糖加胰岛素