哪一项提示低血钾
A．神经肌肉兴奋性增加B．肠鸣音消失，四肢肌力低下C．心音亢进，心率减慢D．呼吸深大E．肠鸣音亢进
参考答案：B
— This car is Mrs Lee’s. She it for over 10 years.
— Really? It looks like a new one.
A．has had
B．has lent
C．has bought
D．has sold
导压管的弯制要求：最小弯曲半径不能小于导压管的直径的（）。
A.1.5倍
B.2倍
C.3倍
D.4倍
