某心源性水肿患者，用地高辛和氢氯噻嗪治疗，2周后患者出现多源性室性早搏。其主要原因是（）

A．低血钾

B．低血钙

C．低血钠

D．高血镁

E．低氯碱血症

句型转换 (10%)

小题1:It takes me about half an hour to get to school.(改成一般疑问句)

             you about half an hour to get to school?

小题2:The man in the front of the classroom is my English teacher.(对划线部分提问)

             English teacher?

小题3:Daniel plans to go swimming every week.(对划线部分提问)

             Daniel  to go swimming?

小题4:How do you celebrate Halloween?. (改为同义句)

__________ celebrate Halloween?

小题5:We have lots of fun at school. (改为同义句)

We __________at school.