低钾血症常表现为：
A．心肌应激性下降B．心肌兴奋性增高C．低血压D．感觉异常E．皮肤苍白、发冷
参考答案：B
新型题根据时间换算关系补全下列句子。
1. There are _____ minutes in an hour.
2. There are _____ hours in a day.
3. There are _____ days in a week.
4. There are about ______ weeks in a month.
5. There are _____ months in a year.
支原体肺炎首选
A．磺胺嘧啶B．磺胺醋酰C．环丙沙星D．磺胺米隆E．四环素
