氯化钾用于强心苷中毒引起的阵发性
A．心动过速B．频发房性期前收缩C．心律减慢D．心房颤动E．心室颤动
参考答案：A
We thought of selling this old furniture, but we have decided to _______ it.It might be valuable.
A．hold on to
B．keep up with
C．turn to
D．look after
属于癌前期病变的是（）
A.白色水肿
B.白色角化症
C.白皱病
D.结核性溃疡
E.均质型白斑
