一般情况下，液力偶合器涡轮的叶片数比泵轮少1～4片，原因是（）
A.制造不便
B.安装不便
C.提高效率
D.避免共振
参考答案：D
While suctioning a client's laryngectomy tube, the nurse should insert the catheter
A．about 1 to 2 inches.
B．as the client exhales.
C．until resistance is met, then withdraw it 1 to 2 cm.
D．until the client begins coughing.
烧伤休克补液时，血压低尿量少要补充()烧伤休克补液时，血压不低尿量少要补充()烧伤休克补液时，中心静脉压高尿量少要补充()
A．晶体液和糖液
B．胶体液
C．升压药
D．A、B均可
E．A、B均不对
